So I have an old MacBook Pro (mid-2014) Core i5 which I've just installed Ubuntu 22.04.2 on. Most things are working fine but the screen randomly flickers and then goes black and then after varying lengths of time will pop back on again. I've been googling around and found lots of instances of similar graphics glitches but can't quite find a solution.

Any suggestions?

I'm starting grad school in neuroscience/biomedical engineering soon, and one of my most dreaded parts of it is inevitably having to develop Matlab code. I understand why people use it -- it's arguably best in class at a lot of engineering tasks, and the matrix-first approach of the language makes it very fast to prototype things if you think like a mathematician/engineer.

However, the language also seems to actively discourage good software practices, and many frequently used scientific projects have atrocious code. Think python dependency management is bad? How about NO DEPENDENCY MANAGEMENT? Yes, that's right, the way you share code in matlab is by importing collections of loose files from github/matlab file exchange. The Matlab neuroimaging code that I have worked has also frequently abused the workspace to share state implicitly between scripts, which makes the code virtually incomprehensible. Instead of using packages to create namespaces, common practice is give function names a prefix and import them into the global namespace.

I know there's multiple large companies that rely on Matlab for their products, so it must be doable; I just haven't seen it for myself yet.

Do you guys have any experience developing in Matlab, and if so, are there any good resources to learn how to build robust software in it? What are some open source projects that have good Matlab code?

Been lurking for a week on tildes now and I am really glad this place exists. The crow here is exactly what I have been missing on Reddit for a while now.

Having said that, the whole Reddit situation has some-what motivated me to get the balls rolling on an idea that I have had for a while and I am looking for advice on the same.

I have often heard this phrase "Learn programming by building" but whenever I dive in to the resources, I fall flat due to the information overload and the general abstractness that the field has (I appreciate abstractness but here it demotivates me) and I have never found a proper resource that I could follow to actually build something instead of just blindly following tutorials and playing with them.

So, my question is how do I translate "learn by building a project" into a practical framework.

I know of 100 days of swift and I really like that approach however I don't think I want to start with swift or build an iOS app right now.

Pretty much, the title.

I have been coding professionally for over 2 decades, been using Git for almost as long ... and to this day, it still feels alien and uncomfortable to use. I keep feeling like I am relearning it all over again. I would really like to find some kind of different resource that helps me to make Git "stick" in my brain, and become more intuitive. Maybe that's just not possible, but I keep hoping.

Meanwhile, my roommate is just starting her journey into programming, and her class just started teaching Git ... and I'm eavesdropping a bit, and they're teaching it okay, but I'm sure there are better tutorials out there for a newcomer.

I am aware of -- and currently reading my way through -- both this recent tildes post and the various tutorials mentioned in it. But I am looking for other recommendations, as well ... and I bet I'm not the only one.

Thanx in advance.

Some of the things I'm concerned about are browsing across unconnected instances - will I need twenty accounts to follow all of the groups? What is the likelihoood of an instance dissapearing? How do you gauge the culture of an instance? Is the https://redditmigration.com/ actually being populated by real admins of those subreddits? Are there any gotchas from joining an instance that I should be aware of? Thanks!

My typical approach is one that I believe is pretty common: Reading the response header for current count and waiting if the limit is reached.

However, I am currently working with a couple of APIs which don't implement that and are currently set up with rate limits on an honesty system.

Is it a case of throwing sleep statements into you code, or using some kind of "bucket" and "lock" system?

I'd be interested to see any simple implementation people have used (the simpler the better).

My main needs are:

• Not too pricey
• Very low idle power
• At least 6 x SATA

I don't need a beefy GPU (the iGPU will be more than I need) or lots of CPU performance (I'll probably pick one of the cheapest compatible CPU).

AM5 is still pretty expensive and the cheap(-ish) motherboards mostly only have 4 x SATA so I would need an extension card. But I'm considering it because 5nm vs 7nm should improve the power efficiency, right? What kind of improvements should I expect there?

Are there any other reasons to go for AM5? I might prefer it for emotional reasons (the lastest and greatest always feels better) so I could use some input from kind strangers.

I could also just wait a bit longer. When should I expect the low-end AM5 comonents to become cheaper?

Please help lol

I currently don't know anything about programming so am considering picking this up on the side in case I loose my current job and need a backup plan. Anyone knows any good books or online courses or anything else for self-learning?

My friends said programming is too broad a subject and what you need to learn depends heavily on what fields you want to go in, which I'm ashamed to admit also know nothing about. So I guess I need some career advice too if possible.

Tildes is pretty technically minded place, so I figured this would be a good place to get some advice. Programming is something I've taken a class or two on (though it's been long enough that I'd like to start from scratch) and I think I have some aptitude for it. The possibility of working from home is also very appealing. However, there are a ton of resources out there, and "learn to code" has been a thing for a while now. Is self-teaching or one of those coding boot camps a viable way to get started in the field? And if so, what are some good resources and practices for getting there? I have some money available, but a degree would be expensive both time and cost wise.

Hey everyone!

Sorry if this is a long post, but I've done my research and I would like to make a few questions.

I've decided that I would like to buy a NAS mainly to storage all of my documents, photos and videos, so that, I can access them from multiple devices and also use it to upload important documents to Backblaze B2. Then, I've actually discovered that I can install a few Docker containers and I could use it as a media server (Jellyfin) and serve the content to my Apple TV (neat!).

I considered a QNAP (better hardware for the price) but everyone recommends Synology instead (because of the stronger security and better overall software), but to be honest, I'm not sure what should I get.

My budget would be to buy a NAS (without counting the disks) below €1000. Ideally, €500-600 but I don't mind stretching to the €700 mark, if it is really worth it.

Spoiler alert: I think, it should be the DS920+ (4-bay) or the DS1520+ (5-bay). I think a NAS above 4-bay is better for future-proofing.

Looking here in Germany at price comparators, I could buy the DS920+ for €663 and the DS1520+ for €750. But these prices seem to be at an all-time high :(

Questions & Assumptions:

0. I'm not sure if the price difference of about €100 is worth the premium to get the 5-bay model. There are only two differences between these two models: The 5-bay has one extra slot, and it has 4x 1 Gbe LAN ports instead of 2x 1 Gbe. All the rest is the same. What is your opinion?

1. I've read that if you run a few containers (~10) it consumes quite a bit of RAM (~3 Gb), so it should be ideal to have at least 8 Gb. This is the reason I've said that I think I can only choose the DS920+ or DS1520+. Looking at official Synology resellers, these models, seem to come already with 8 Gb, and they are within my budget. Is my research wrong?

2. These two models, have an encryption engine. I think this is necessary to encrypt my files before sending them to Backblaze, or?

3. A lot of people seem to say to simply pick Synology's hybrid RAID setup called SHR-1 or SHR-2. I would go the easy way here and pick one of those two. Would you think that is a bad idea, and it is better to pick a specific (standard) RAID? I've read about the long long long RAID rebuild that could happen in some situations, and picking the "right" RAID could decrease the rebuild in days (or weeks!!!!).

4. In case, I choose a NAS model with Nvme cache slots, most people say it is not worth it to use if you are not running Virtual Machines and the SSD’s "burn" really fast. I have no interest on VMs.

5. Most people say to pick an Enterprise (Server) HDD instead of a NAS HDD mainly because price is similar in some cases and Enterprise has longer life and warranty. I should also pick a CMR HDD which is helium filled. 5400 rpm would be preferable to 7200 rpm because of the noise. Sadly, all Enterprise HDD's and most of NAS HDD's are 7200 rpm. Is the noise difference that big? The NAS will be in our living room.

6. Is 8 TB still the best cost per Terabyte?

7. I was extremely sad to hear that the Hitachi hard drive division was bought by WD. I've had lots of misfortune with WD drives (and let's not forget the debacle with the SMR and CMR drives) and I would prefer not to give money to them, but, nevertheless, I'm still tempted to buy the Ultrastar drives that belonged to Hitachi. Does anyone know if WD kept the components, manufacturing processes, staff, etc., that made these brilliant disks?

8. Following the HDD topic, what is your experience with Seagate or Toshiba drives?

9. These two NAS models have the same Intel Celeron CPU, which supports hardware transcoding. To be honest, I don't know in which cases would that happen. It seems if I use Infuse on the Apple TV it would never transcode (and instead direct play) because Infuse would do the transcoding in software. Should I take in account that hardware transcoding is a must-have or a nice-to-have?

10. Would you recommend having a CCTV system connected to the NAS? Should I dedicate one entire HDD just for the NVR system? Would a standalone NVR device be better?

11. My last question is: Should I just wait for the new model of the DS920+ or DS1520+? The 20 means it was launched in 2020 (in Summer specifically) and it seems Synology refreshes the model every two years., that means, a new model would be available in Summer this year. Most people say it is not worth the wait because Synology is very conservative in its model updates/refreshes. People are saying that a better CPU will be of course available (do I even need that for my use cases?) and probably upgrade the 1 Gbe LAN ports to 2.5 Gbe or 10 Gbe (10 Gbe I really doubt it). I've read that a 4K stream does not fill a 1 Gbe bandwidth, and you could theoretically have three 4K streams in a single 1 Gbe connection. If all else fails, I could just do a link aggregation of the two ports to be 2 Gbe, or?

12. Anything I'm forgetting? Should I be careful with something in particular?

I know I should buy a UPS too, but I think I'll create a separate post regarding this topic because I would also want a recommendation regarding a UPS for my other devices.

I know that I could actually build my own NAS and use Unraid for the OS. Furthermore, I'm just at a time in my life with too much on my plate (baby and small child) and having something that just works is preferable. When they are older and more independent, I'll have more time to investigate this option :)

Again, sorry for the long post. Thank you everyone!

I finally got around to upgrading my mom’s computer (an Asus laptop from 2015) from Windows 8.1 to Windows 10. I’ve already deleted a few apps she won’t use (e.g., Xbox) and disabled/stopped some unneeded services. What else can I do to keep her computer fast? Particularly interesting in more services I can disable and the best browser/ad blocker combo. Thanks y’all!

Title says it all. Bootstrap+jquery has been my default route and path of least resistance when it comes to web development. Perhaps because I'm coding since a long time and belong to the old school when modern libraries like react weren't yet invented yet?

I had tried to meddle with Angular.js 1.0 back in those days but was soon disillusioned! It was cool and cutting edge but highly opinionated. It tried to do so many things under the hood that I soon quit the effort and the word "Angular" was stigmatized in my mind ever since! I don't know how different today's typescript based Angular is but that stigma or phobia prevents me from even looking at that direction!

React is another cool technology which everyone is talking about and I'm sure it has some merits. But I'm not sure exactly what React brings to my development workflow which jquery doesn't already do. Can you tell me some specific advantages or pros of react over jquery which can motivate me to learn the former and let go of the latter? What should I do?

I finally decided to accepted that my interest in working and playing with computers and servers is worth to spend some money on. So I ditched my old box in the corner and with it all my fights with my ISP, their NAT, dynamic DNS and all that and got myself a VPS and 1 TB storage solution for less than I would have paid a static IP with my ISP.
Best decicion ever :-)

So I'm getting into Docker a bit, just because it's just so easy to get Nextcloud running. I used native Caddy as a reverse proxy, because if I got this "machine" there I will use it for other things as well, so make it right from the beginning. And I used native b.c I did not yet understand bridge/host mode and installing caddy native seems easier.
Then I fought for one day with CIFS and the nextcloud gui to get the semantics right to get my storage solution accepted as external storage.
Then I set up Jellyfin with Docker because why not. As well through caddy.
Then I fucked something up and was like, fuck it, lets start again this time for real :-P
I wiped my VPS clean (chose ubuntu again) set up and hardend ssh + sudo installed Docker, and then I found out about docker rootless and in the docker docs it's mentioned that it is/might be more secure, so I set up docker rootless and installed all the rest again.
And then I was like, hmm, do these Docker Images/Containers update themself? Like snap did?
It seems not, so I looked for a solution and found watchtower. And now I wasted another day trying to get watchtower to run, and I just can not.

I tried so many variations of the run command now most recently I tried:

docker run \
--name watchtower \
-v ${DOCKER_SOCKET_PATH}:/var/run/docker.sock \
containrrr/watchtower

time="2023-01-20T01:17:41Z" level=error msg="Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?"
time="2023-01-20T01:17:41Z" level=info msg="Waiting for the notification goroutine to finish" notify=no

/run/user/1000/docker.sock exists, I own it, i tried connecting to it through docker -e and containrrr/watchtower --host "unix:///run/user/1000/docker.sock"
I dont now what to try more and I'm at my end with my ddg-fu as well.

And now while proofreading this, I read everything again and decided to try something again and it just worked...

docker run \
--name watchtower \
-v /run/user/1000/docker.sock:/var/run/docker.sock \
containrrr/watchtower

seems like the environment variable was not set. But I'm shure I tried that before and it did not work... ghost in a machine :-)

So thats where I'm at. I have to say it was a lot of fun and doing and learning all that tingled my brain in a funny way :-)

But now I have some questions for my much more experienced Tildes-friends:

• Do I even need watchtower? because I'm not actually interested to connect to my server regularly to do the updates/maintenance.
• Was switching to docker rootless even a good idea? it seemed so reading the docker installation docs, but just now I read the Archwiki and there it seems it has some heavy security implications, so I made the security situation acutally worse by thinking making it better.
• How do I get this watchtower thing to fucking work? (only if I actually need it)

I very much appreciate all further/other advise, tricks, recomendations, questions and discussion as well :-)

(apologies if this isn't the correct place to ask, I'm just a bit out of ideas)
(content warning for abusive parents)

I have a friend who's abusive parents track her location using the stalkerware app life360.

she currently runs graphene os (android 13) on a pixel 7 pro.

in my past android experience there are plenty apps that can spoof your location via developer settings. however they all crash on android 13 (or at least on graphene..)

see below (none of these work, and they also crash on my android 13 phone, but they have worked for me in the past on like android 9):
https://github.com/mcastillof/FakeTraveler
https://github.com/wesaphzt/privatelocation
https://github.com/warren-bank/Android-Mock-Location
https://play.google.com/store/apps/details?id=com.lexa.fakegps&gl=US

if there are no functioning apps that will do this. do you know any other solutions? on other android roms or with root with magisk / xposed? obviously this is less secure than graphene os but the current problem is her parents more than anything else.

we r also considering a secondary phone just for the stalkerware which can be opportunistically left in innocent places. or just killing the life360 app on occasion when needed. or just letting the phone die when it needs to. But not sure how obvious this might be to the abusers. any insight is appreciated.

(suggestions like "leave her parents" are good but far easier said than done and while it will eventually happen its not feasible at the moment. That being said if you can provide detail suggestions are welcome)

Thanks :)

I'm primarily a freelance backend dev and for the first time venturing on full-stack development of a non-trivial web app on my own, hence I needed some guidance.

I've got all the backend stuff in php/mysql covered, I just want to know what's the best way to create a dashboard (with left sidebar) considering various aspects like long-term code maintenance and support, robustness, etc. Looks don't matter that much as it's a CRUD app but obviously, better is more appreciated.

Based on my research until now, AdminLTE seems to be the most popular way of doing it among most devs although a few others like material and coreui also seem to have some street cred.

But another approach I'm considering apart from AdminLTE is to just use pure bootstrap and fiddle up my own sidebar using something like this. That way, I won't be tied to just one Bootstrap version which is used by AdminLTE (v4.6) and troubleshooting will be much easier through google search and StackOverflow. What do you guys think is the right approach?

Hello, I've had two ideas for games I find pretty compelling, and both would require different custom scripting languages. Unfortunately, I don't have any formal CS education or experience with parsing or scripting languages. So, I'm feeling a bit lost and thinking it'd be a herculean effort, is that correct?

Has anyone here written their own language or DSL and have any insights, resources, or starting points to share?

Hello everyone,

I usually do my own research, and then I try to find multiple matching results and afterwards, read specifically in detail about each recommendation, but, I have to be honest that for UPS recommendations that I’ve seen, it seems to be a very personal recommendation depending on the wattage and connected devices.

First of all, most people recommend CyberPower or APC, but I’ve also seen some recommendations for Eaton. Is there any other brand that I should be looking into?

The devices I would like to connect to a UPS would be: desktop, TV, Apple TV, NAS, router and probably my Nintendo Switch.

There are some general things I've found out while searching that I think I would like some confirmation:

• I actually think I should buy two UPS's, or? I think just one for the desktop and another one just for the remaining devices, since the desktop uses a lot more wattage.
• Pure Sine Wave: It does not matter for smaller stuff (routers, etc) but it seems that anything above 70 W, it should use a UPS with this. So, that would mean I need pure sine wave, since my desktop and TV definitely use more than 70 W of power.
• Some people said to search for a UPS with line conditioning so that you always get a perfect sine wave. Would you agree?
• USB connection (not a faux USB!) so that the NAS detects the power failure and shuts down gracefully.
• It is important that the UPS has removable battery for better longevity.

How would I choose a UPS? Do I need to see the total wattage of all my devices and then pick the UPS accordingly? Anything I'm missing?

My budget would be up to €100 or €150 in case it is really worth it.

Thank you in advance for all replies.

Right now I've got a shitty WD EX4100 and everything was sort of running along nicely with docker and all, but today it rebooted and decided that it didn't want to do anything with docker anymore. I got the thing before I got into Linux and its time to move on.

Someone locally is selling the following for $250CAD

• Quad core Celeron @ 2Ghz
• 8GB RAM
• Fractal Node 304 case
• 2x WD 2TB Red 3.5" hard drives
• 120GB Kingston SSD
• 700 watt semi-modular power supply

All I run are the following:

• nzbget
• sonarr
• qbittorrent (but I'll switch to a better one)
• serve up content to my HTPC (running Kodi, so no transcoding or anything)

I don't need the drives that come with it. I'll be putting in 4x 4TB WD Reds. Right now the box is running Open Media Vault 6, so I'll give that a swing, otherwise it'll just be Ubuntu server.

How does this sound? I'm not opposed to spending some money on a new NAS, I just want something simple that I don't have to fuck around with too much.

I ended up going with the HP Proliant

OS: Ubuntu 20.04.3 LTS x86_64
Host: ProLiant ML310e Gen8
Kernel: 5.11.0-43-generic
CPU: Intel Xeon E3-1230 V2 (8) @ 3.700GHz
GPU: 01:00.1 Matrox Electronics Systems Ltd. MGA G200EH
Memory: 32GB

It's pretty good so far. Thanks everybody!

Is anyone here familiar with crawling the web? I’m interested in broad crawling, rather than focusing on particular sites. I’d appreciate pretty much any information about how this is usually done, and things to watch out for if attempting it.

Hi all. I am asking this open-ended question (bottom of this post) because I am considering making contributions to an open-source project that would directly benefit me and other users.

Some background:

I have worked with an engineering simulation software called Ansys MAPDL basically everyday for the last 4 years, in both an academic and a professional capacity. It's not necessarily relevant whether you are familiar to that program to participate in this discussion. The relevant thing is that the GUI for MAPDL is written in Tcl/Tk and I don’t imagine it is going to be modernized (because of more modern, but distinctly different, replacements). This is a screenshot of the GUI for reference.

Why do people put up with such an old interface?

The power of the program is not its GUI, but the scripting language that can be run to setup and solve simulations. The program name is really the scripting language name, Ansys Parametric Design Language (APDL). It's somewhat like Matlab. The program also offers an enormous amount of control when compared to the more modern GUI that's been released, since the modern GUI holds a totally different philosophy.

The older GUI is really helpful in certain circumstances because it will spit out a file containing commands that were used in the session. This is a great demonstration of how to run a command or use a setting/config command, but a lot of newer features are buried in the documentation and aren't available in the older GUI.

My coding experience

I know the MAPDL language very intimately, but my experience beyond it is limited to some Perl scripting, and a bit of Python exposure.

Motivation

Open-Source Ansys API

Recently, Ansys started supporting an open-source Python project called PyAnsys. MAPDL is otherwise fully closed source, and this is really the only public-facing API. PyAnsys has basically converted a lot of MAPDL script commands to a pythonic format, hence Python can now be used to interact with MAPDL. This is great for several reasons, but is limited regarding interactivity. Interacting with MAPDL via Python is basically happening in a fancy console via Jupyter notebook or IDE like Spyder. Certain commands will bring up Python-based graphics displays of solid models and results plots, but there isn't a dedicated GUI open all the time.

The Question(s)

My question is whether it is feasible to write a frontend GUI to a bunch of python commands. If you were going to do it, how would you do it? What might you write it with? Would you even do it? Is this a stupid endeavor?

Let me start by saying this is a space I am not at all familiar with. I didn't grow up with IRC, my first text editor was Sublime (I'm not from the "EMACS vs. VIM" generation,) so I feel kinda outta touch with what all is going on.

Is there a winner? I feel invested in this topic after seeing a whole slew of posts, blogs, and medium articles posted all over Reddit and HN breaking down how these folks have personally been impacted over the past month or so. It seems to have died down which leaves me with the question of what the outcome was. An even 50/50 split? Libera destroying Freenode? Or Freenode able to hold onto users by successfully preventing efforts to organize a transition?

Without being in the Freenode community, I don't have a feeling for whether Freenode is dead, Libera Chat is "winning" and I don't think there's a good way to get metrics either.

Anyone in this world who can help the uneducated out on the outcome of all of this?

My Goal

I am applying to Canadian universities for fall admission as a CS major. This will be my second degree, and one of the requirements of getting admitted for a second degree is to show that you have a significant interest in the subject. My plan is to get online certificates to show that I am actually dedicated to learning CS and getting a job in the field. I am actually dedicated, I just need a way to show it on paper. I have some experience with software development (only the basics), but there aren't any records of it since it was just informal study.

My Problem

I can't decide which certificates I should pursue. I am torn between EdX and Udemy. I would Tilderinos' help in choosing between the two. I would also appreciate any general advice you may have.

Here are the courses I plan to take on EdX (prices in USD):

UBC's MicroMasters Program in
Software Development - $832

Harvard CS50's Web Programming with Python and JavaScript - $199

IBM's Professional Certificate in
Cloud Application Development Foundations - $169

Here are the courses I plan to take on Udemy:

The Ultimate 2021 Fullstack Web Development Bootcamp - $15

The Complete 2021 Web Development Bootcamp - $15

The Ultimate MySQL Bootcamp: Go from SQL Beginner to Expert - $30

Angular - The Complete Guide (2021 Edition) - $15

Comparisons

To reiterate, I have two goals going into this. One is to actually learn web development, since I would like to become a fullstack developer (but my options are semi-open). The other is to prove to the Canadian universities that I am dedicated to learning and to give myself an edge over applicants.

If I go with EdX, then I have to pay a much steeper price for the certificates. These courses also take a long time to get through and the projects don't seem as relevant to real word applications. But I will also be learning from established institutions like Harvard and UBC. EdX certificates also come with the distinct advantage that a human is checking the problem sets you submit. This will show the Canadian universities that I have actually spent the time and effort to go through the courses and pass them.

If I go with Udemy, I will get through the courses in less time and their projects seem more related to real world projects. If I go through the courses faster, I will also have more time to start on some personal projects, and I can show my dedication to learning through those projects. Personal projects and also volunteer work will also help establish a resumé for future work. The courses on Udemy are a lot cheaper too. But they don't have the same level of verification or prestige that EdX does.

So in summary, EdX has prestige and quality courses, but a steep prices and a huge time commitment. Udemy is cheaper and gives me more opportunities to do personal projects and volunteer work, but it's certificates aren't fully trustworthy from the Canadian universities' perspective.

Final Words

What do you think? Which path should I take?

For those of you wondering, why I am going to university instead of a bootcamp, it's because I plan to immigrate to Canada and becoming a student seems the straightest way of getting PR. I need to leave my third world country as soon as I can, for mental health and economic reasons. I have been mostly unemployed ever since the pandemic started so I can't get work in Canada (or the U.S.) on my first degree (a management degree). I already tried that route. I can't find proper work here either.

Also, I am sorry if I posted in the wrong group, or if I shouldn't have posted it anywhere at all. I desperately need advice on what to do and I don't have a trustworthy network here that can help me through this. I'm sorry and thank you for your help.

I'm setting up a server with nextcloud, plex, matrix and some other things I don't yet know, for some friends and family, (about 20 people if I get lucky)
and now I heard of a thing called single sign on/unified login. (Login to different services with the same user/pw and/or login once, access to all services)

so far I found out about Keycloak https://en.wikipedia.org/wiki/Keycloak

is this what I'm looking for? does anybody have experience in this? Are there other/better/simpler solutions for this?

I recently set up kubernetes to run on an old laptop. The goal was two-fold, 1 learn kubernetes and 2 setup an instance of nextcloud. I've managed to set everything up with cert renewals for my domain and enabled dyndns in case my provider changes my ip. All well and good and quite nice learning experience! Now I would like to also start running my own email server and have some questions. Is ther any that have a helm chart that is easy to setup in kubernetes? Since I am running this from home I imagine I'm more likely to be classified as a spammer. What can I do to minimize the likelihood of that? I read somewhere about reverse DNS, but not entirely sure if it is possible to do given I am running it all at home via a regular ISP.

I have a Xiaomi Redmi 4X device with 2GB RAM and 16GB on-device storage.

Yesterday, I setup PostmarketOS on it, and it works well enough. WiFi and display work well, although no 3D acceleration and no telephony at all. As such, now it is just another device on my home network, except that I can ssh into it to do some basic stuff. Right now it is setup as a Syncthing node to backup my Keepass db and personal knowledge base written in org-mode, but I would like to use it further, and looking for ideas.

Two things to consider, though. First, I don't want it to overcharge and bust the battery. Before when it was on LineageOS, I had a magisk module acc so it would charge only 40-80%, and is largely the reason why the battery holds up pretty well after 5+ years without swelling. I will take further look into it over coming weekend and try to make something like it for the alpine kernel included in PmOS. Second, while on charging the phone keeps vibrating repeatedly. I have no idea how to fix that one, but would like to strat given pointers. (I have never done kernel dev in my life)

So, any ideas on what I can use this extra computer in my metaphorical basement welcome. Thanks in advance.

It is late... and I am pretty much finished with migrating to a new VPS provider. I got rate limited with two domains, but I'm running everything through Cloudflare. Do I need to bother with LetsEncrypt on the VPS itself? When I check the domains, the certs from CF are working nicely.

This is my first time using CF.

Quick edit while I pretend I can sleep.

I’m thinking that CF will cover me for 443 and route all traffic there. I’ve got wildcards set for domains with services that require other ports — which is working. All CF is doing is caching my sites, right?

I've been learning a bit more Python, going through a Udemy course to expand my skills a little. One of the programs the course guides you to make is a little dictionary, but it currently only runs once and then quits.
I'd like to adapt it to use a nice TUI that keeps itself open until the user specifies they want to quit, using something along the lines of npyscreen. However, this library uses classes, and that's not something I'm yet familiar with. I'd rather have an understanding of what classes are, how they work, and why to use them before I take the plunge and start fiddling around with npyscreen (although I'd be interested to hear if you think that I should Just Do It instead).
Can anyone give or point me towards a good explanation of the what, how, and why of Python classes? Or better yet, a tutorial that will give me something to write and play with to figure out how it all fits together?
Thanks!

I don't need answers so much as an idea of where to start.

Essentially, I have a Google Sheet that uses importjson.gs to pull from the following APIs

• OMDB (IMDB)
• TheMovieDB
• TVMaze

I also use another script to scrape Letterboxd for ratings.

This works well, but sometimes it'll time out or I'll hit urlFetch limits that Google has in place.

Basically, I'd like to have a text file (input.txt) where I pop in a bunch of titles and year or IMDB IDs, then the script runs and pulls set endpoints from all of these, outputting everything on one line (a pipe as a delimiter.)

My thinking is that I can then pull that info a sheet and run all of the formatting, basic math, and whatever else so it suits my Sheet.

I have a feeling I'll be using requests for the JSON and beautifulsoup for letterboxd -- or maybe a module.

Can anyone point me in the right direction? I don't think it'll be too difficult and should work well for a first python project.

I still mainly use Windows, although I've dual-booted Linux a few times and I have Linux Mint on an old laptop right now. One thing I've never understood about Linux is all the different distributions - their different reputations and why they have them. What is the mechanical difference between using one distribution of Linux and another? Or are the differences usually not mechanical?

For example, Ubuntu and Debian seem to be large families, meaning that a lot of other distributions are based on them (using packages built for them in their package managers at least) as well as being popular distros on their own. But what's different between the two of them, and between each and the other distros based on them? (and what's similar? I gather they all use the Linux kernel at least!)

I also know that people are quite opinionated on their choice of distro, I wondered what reasons people had for their choice. What things are easier or harder for you in your distro of choice? Is it mainly day-to-day tasks that are important or more how the OS works underneath? How much difference does your preferred distro make?

For myself, I've only used Kubuntu (though not much) and Linux Mint, which was mainly for UI reasons, and particularly for the latter, ease of use for someone used to Windows (at least that was what I found years ago when I first looked into it).

Though I doubt I'll ever fully move away from Windows I would like / need to have access to a Linux OS, so maybe this will help me to know what is important to look for. But I also hope it'll be a useful and interesting discussion topic. Also, there are some previous discussions on the latter question so I'd be more interested in learning about the main topic.

also, please do add more tags

Hey guys,

I have been flip-flopping back and forth on this idea for a while, and would love some feedback on whether peeps would find this valuable.

Although I still call my self a "software developer" (and try to code daily), for the last 8 years I have ran a small 5-person agency that I started from the ground up, so my role was really CEO/CTO/CFO/Everything-O. My company focused on delivering high-quality custom software. Not brochure websites, and not Wordpress - our niche was internal business software (or as I like to call it "boring software for boring businesses") - and for a client service company we got very high margins of return.

Last year my business was acquired by a larger company which was an amazing result after the time and effort I had poured into it. I have realised I now want to help other developers who want to start their own software agency, or maybe they already have and are looking for hints or advice on certain topics.

So I have started Dev to Agency - a part blog part guidebook for how a full-stack developer can start and successfully run a software development agency, the things to pay attention too (and the things to ignore), and the key-values that I feel helped my business go from nothing, to 7 figures per year, and then to being acquired (if that is a path people would want to take).

I have just published my first couple of posts, About Dev To Agency that is a rundown of what I hope to achieve with this, then a post about My small custom software development agency - which gives an overview of what I built and where I think my articles will add value, and lastly You are the gold standard which covers how I feel an owner/maker should set the businesses standards and practises based of their personal values.

I have never written a blog before (or really done any writing before), so it would be fantastic to get some feedback from the community, and if there are any developers that this could interest then please subscribe on the website.

Cheers,

Chris.

I see some people using NixOs on their servers. I would like to try it out to self host some services and learn about NixOs.

I use hetzner and they have an NixOs iso available so I can just use that to install NixOs. But how do people manage remote instances of NixOs? They would just use ansible or something like it, to run nix on the host, or is there a better way?

Thanks

I've just read a journal from someone on another site saying that they wished there was a blacklisting system which stopped them seeing submissions from, to or about certain other users in their feed, as it is potentially trauma-inducing for them to log in and keep seeing them come up. I assume that the person looking for this blacklist isn't realistically able to just leave the site, because it's the most populous of its kind and serves as an art portfolio or source of income.

Is this, or something like it, actually possible to do with custom ad-blocker rules, or do they need to just wait for the site's admins to get around to it?

I'm attempting to provision two mirror staging and production environments for a future SaaS application that we're close to launching as a company, and I'd like to get some feedback on the provisioning script I've created that takes a default VPS from our hosting provider, DigitalOcean, and readies it for being a secure hosting environment for our application instance (which runs inside Docker, and persists data to an unrelated managed database).

I'm sticking with a simple infrastructure architecture at the moment: A single VPS which runs both nginx and the application instance inside a containerised docker service as mentioned earlier. There's no load balancers or server duplication at this point. @Emerald_Knight very kindly provided me in the Tildes Discord with some overall guidance about what to aim for when configuring a server (limit damage as best as possible, limit access when an attack occurs)—so I've tried to be thoughtful and integrate that paradigm where possible (disabling root login, etc).

I’m not a DevOps or sysadmin-oriented person by trade—I stick to programming most of the time—but this role falls to me as the technical person in this business; so the last few days has been a lot of reading and readying. I’ll run through the provisioning flow step by step. Oh, and for reference, Ubuntu 20.04 LTS.

First step is self-explanatory.

#!/bin/sh

# Name of the user to create and grant privileges to.
USERNAME_OF_ACCOUNT=

sudo apt-get -qq update
sudo apt install -qq --yes nginx
sudo systemctl restart nginx

Next, create my sudo user, add them to the groups needed, require a password change on first login, then copy across any provided authorised keys from the root user which you can configure to be seeded to the VPS in the DigitalOcean management console.

useradd --create-home --shell "/bin/bash" --groups sudo,www-data "${USERNAME_OF_ACCOUNT}"
passwd --delete $USERNAME_OF_ACCOUNT
chage --lastday 0 $USERNAME_OF_ACCOUNT

HOME_DIR="$(eval echo ~${USERNAME_OF_ACCOUNT})"
mkdir --parents "${HOME_DIR}/.ssh"
cp /root/.ssh/authorized_keys "${HOME_DIR}/.ssh"

chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys
chown --recursive "${USERNAME_OF_ACCOUNT}":"${USERNAME_OF_ACCOUNT}" "${HOME_DIR}/.ssh"

sudo chmod 775 -R /var/www
sudo chown -R $USERNAME_OF_ACCOUNT /var/www
rm -rf /var/www/html

Installation of docker, and run it as a service, ensure the created user is added to the docker group.

sudo apt-get install -qq --yes \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo apt-key fingerprint 0EBFCD88

sudo add-apt-repository --yes \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

sudo apt-get -qq update
sudo apt install -qq --yes docker-ce docker-ce-cli containerd.io

# Only add a group if it does not exist
sudo getent group docker || sudo groupadd docker
sudo usermod -aG docker $USERNAME_OF_ACCOUNT

# Enable docker
sudo systemctl enable docker

sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
docker-compose --version

Disable root logins and any form of password-based authentication by altering sshd_config.

sed -i '/^PermitRootLogin/s/yes/no/' /etc/ssh/sshd_config
sed -i '/^PasswordAuthentication/s/yes/no/' /etc/ssh/sshd_config
sed -i '/^ChallengeResponseAuthentication/s/yes/no/' /etc/ssh/sshd_config

Configure the firewall and fail2ban.

sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow ssh
sudo ufw allow http
sudo ufw allow https
sudo ufw reload
sudo ufw --force enable && sudo ufw status verbose

sudo apt-get -qq install --yes fail2ban
sudo systemctl enable fail2ban
sudo systemctl start fail2ban

Swapfiles.

sudo fallocate -l 1G /swapfile && ls -lh /swapfile
sudo chmod 0600 /swapfile && ls -lh /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile && sudo swapon --show
echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab

Unattended updates, and restart the ssh daemon.

sudo apt install -qq unattended-upgrades
sudo systemctl restart ssh

Some questions

You can assume these questions are cost-benefit focused, i.e. is it worth my time to investigate this, versus something else that may have better gains given my limited time.

1. Obviously, any critiques of the above provisioning process are appreciated—both on the micro level of criticising particular lines, or zooming out and saying “well why don’t you do this instead…”. I can’t know what I don’t know.

2. Is it worth investigating tools such as ss or lynis (https://github.com/CISOfy/lynis) to perform server auditing? I don’t have to meet any compliance requirements at this point.

3. Do I get any meaningful increase in security by implementing 2FA on login here using google authenticator? As far as I can see, as long as I'm using best practices to actually ssh into our boxes, then the likeliest risk profile for unwanted access probably isn’t via the authentication mechanism I use personally to access my servers.

4. Am I missing anything here? Beyond the provisioning script itself, I adhere to best practices around storing and generating passwords and ssh keys.

Some notes and comments

1. Eventually I'll use the hosting provider's API to spin up and spin down VPS's on the fly via a custom management application, which gives me an opportunity to programmatically execute the provisioning script above and run some over pre- and post-provisioning things, like deployment of the application and so forth.

2. Usage alerts and monitoring is configured within DigitalOcean's console, and alerts are sent to our business' Slack for me to action as needed. Currently, I’m settling on the following alerts:
   1. Server CPU utilisation greater than 80% for 5 minutes.
   2. Server memory usage greater than 80% for 5 minutes.
   3. I’m also looking at setting up daily fail2ban status alerts if needed.

Hi! I've heard tilderinos talking about the gemini-verse on some other posts; I tried it out this evening and it honestly felt strange browsing in terminal and even stranger navigating the web without search engines. I was wondering if anyone had a gentler introduction than the official site? I feel like I've got a ship, but no map to this new verse.

Suppose I am trying to iteratively produce a completed image from some subset using a combination of convolutional/DNN methods. What Image norm is best?

The natural (for me) norm to ascribe to an image is to take the bitmap as a vector with L₂. If the input image is anime or something else, the uniform coloring makes this very likely to be a good fit in a low dimension - that is: no overfitting.

However: pictures of fur. Given a small square, the AI, set to extrapolate more fur from that single image, should be expected to get that stuff right next to the given subimage right, but further away, i want it to get the texture right, not the exact representation. So, if the AI shifts the fur far away from the image left by just the right amount, it could get an incredibly poor score.

If I were to use the naive L₂ norm directly, I would be guaranteed to overfit, and you can see this with some of the demo algorithms for image generation around the web. Now, the answer to this is probably to use a fourier or a wavelet transform and then take the L_N norm over the transformed space instead (correct me if I'm wrong.)

However, we get to the most complex class: images with different textures in them. In this case, I have a problem. Wavelet-type transforms don't behave well with discrete boundaries, while pixel-by-pixel methods don't do well with the textured parts of images. Is there a good method of determining image similarity for these cases?

More philosophically, what is the mathematical notion of similarity that our eye picks out? Any pointers or suggestions are appreciated. This is the last of two issues I have with a design I built for a Sparse NN.

Edit: For those interested, here is an example, notice how the predictions tend to blur details

Last Thursday, at my workplace, we rolled out a software upgrade across the company. The server side was upgraded overnight to ensure there was minimal downtime, and we had instructions for users posted on our Intranet (pinned to the top for the next 4 days), on exactly what they needed to do to run the upgrade on their PCs and ensure everything was working correctly.

The instructions were written with the help of my 4-year-old to ensure it was clear enough for anyone to read and follow along.

I still received at least 40 messages and emails from people complaining the upgrade didn't work or that certain Outlook plugins are now missing (which was covered in the instructions).

My question is, has anyone found a good way to ensure people follow instructions, or the best way to ensure that your instructions are easy to understand and follow along with?

It is very frustrating to take the time to ensure things go smoothly and write what even my 4-year-old thought was clear instruction, and still have a third of the company not be able to figure it out?

This is not meant to be mean hearted in any way, I genuinely would like some advice or tips on how I can improve on this the next time around.

Thanks.

I'm working on an application that allows a user to view playlists belonging to a particular radio show and stream/download/favourite the tracks in them. It has 4 core entities: User, Show, Playlist and Track.

• Each show has multiple playlists (one-to-many)
• Each playlist has multiple tracks (one-to-many)

To be able to reference a playlist belonging to a particular show. I gave those playlists the same uuid as the show they belong to. A few questions though.

1. Is this the right/best way to associate data?
2. As a track could potentially belong to multiple playlists, I can't take the same approach as I do for (show/playlist) How would be best to handle this? Ideally I would like to have a single "Track" table containing all tracks for all playlists.

For any experienced database designers out there, how would you structure this data? What would you consider in designing the schema and why? If I did go with 4 tables only, presumably there would be performance implications given the potential amount of data in any one of those tables, particularly tracks. If that is the case, how best to structure this kind of thing with performance in mind? Thanks in advance for any help :)

For reference, in case it's of importance, I'm using sqlite3.

Hey everyone,

I've been programming for some time now but notice without any formalized education in CS I often get lost in the weeds when it comes to developing larger applications. I'm familiar with the principles of TDD and SOLID - which have helped with maintainability - however still feel that I'm lacking in the ability to architect a properly structured system. As an example, I'm currently developing a flask REST API for a website (just for learning purposes). This involves parsing a html response and serializing the result as JSON. I'm still quite unclear as to structuring this sort of thing. If any more experienced developers could point me in the right direction/offer up their opinion I'd be very appreciative. Currently I have something like this (based - I hope correctly? - on uncle bob's clean architecture).

Firstly, I'm defining the domain model. i.e the structure of the API response. Then, from outside in.

1. Infrastructure (Flask): User makes request via interface (in my case a request to some endpoint)
2. Adapters: request object checks if the request is valid (on the way back it checks if the response is valid) - Is this layer only for error handling?
3. Repository: I'm struggling a bit here, AFAIUI this layer is traditionally a database. In my case however, where the request is valid, is this where I should handle the networking layer? i.e all the requests to return the website source? I'm also confused given at this stage I should be returning the relevant domain model, like an ORM, but as my data is unstructured, in order to do this I need to transform the response first. Where would it be best to handle this?
4. Use Cases: Here I transform the domain model depending on the request. For example, filter all objects by id. Have I understood this correctly?
5. Serializers: Encode the domain model as JSON to return from flask route.

If you got this far, thanks so much for reading. I really hope to hear the opinions of more experienced devs who can steer me in the right direction/correct me should I have misunderstood anything.

I am a fullstack developer that spends a good portion of my time building out complex User Interfaces, and the rest building out back-ends for that software. In my opinion the current method that my company uses for a designer to developer hand off is a bit lacking in efficiency.

The current method is usually a designer will provide a developer with a Photoshop (or very occasionally an Illustrator) file containing the entire applications design. It is then up to the developer to export assets (both quick exporting things as pngs, going through and separating shadows from assets, or creating assets from the layers provided) and dig through the file to determine fonts and placement of items.

Is it a common expectation that a developer should be spending a good chunk of time in Adobe on asset manipulation?

Additionally does anyone have any process or program suggestions that may make life easier?

I read the AskReddit thread on "What costs less than $100 that changed your life?" (link unavailable since I'm at work) but someone responded "SQL" - jobs just open up that make a ton of money.

I did a cursory search on Indeed and holy moly they were right -- SQL jobs get easily 2x what I make now. I'm pretty good at Excel and that sort of thinking, so I was thinking I'd try taking a class.

Do yall have any recommendations as to a good course to take in SQL, preferably online, preferably free or cheap? I'm willing to pay a bit if it'll mean I can make a lot more, but I'm currently not making a ton, haha.

Any responses welcome, including ideas as to how to break into like, tech-oriented fields as well.

I've been thinking on and off about packaging up a few simple Python utilities I've written to stick up on Github for people to use if they want, but, every time I go to check out how one goes about managing dependencies and all that for a project, I run into a whole wall of options. Does anyone better versed in all of this have any recommendations for me?

I have two computers (a desktop and a laptop) that broke down just before my city entered a lockdown. Being able to assemble and fix my own computer hardware is something I have always wanted to do, and if I knew that I would probably not be using a borrowed Macbook Air right now.

I have no immediate need to provide any maintenance services, nor do I require a primer in electronics or anything too advanced. Just enough to know how to assemble and disassemble a machine, identify and fix the most obvious issues without breaking anything.

I tend to learn better from sequential and structure learning materials, preferably in text/images form. But videos are also welcomed. I know the names of the things and what they are, but I don't really know how to put things together in practice.

Suggestions? :)

I have basic notions of HTML and CSS, but nearly zero JS knowledge. I can perform simple customizations and I know how to follow instructions.

It is not my intention to create anything from scratch (so the platform should have plenty of free themes), nor do I want to become a webdev or webdesigner. This is not a technical project for me, my main concern is the content.

I currently have a blog that uses Wordpress with a purchased theme. It's good enough, but a bit slow to load. Besides, simpler platforms might be easier to understand and manipulate.

This alternative would also need to be FOSS and easy to self-host.

As a plus, it would be awesome if I could manage the blog/website from within Emacs/Org Mode.

Any ideas?

I have a large VirtualBox VM on an external HDD. The HDD fails the S.M.A.R.T. test. The VM still works fine, but any regular attempt to copy the VM files over to a healthy drive fails ... there is clearly already something corrupt in the VM's virtual HDD, although it is not (apparently? yet?) affecting the functionality of the actual VM.

Any suggestions on how to save the VM? Linux Mint Guest OS, Pop_OS (Ubuntu) Host. The VM is nearly 800 GB. Both regular copy and rsync fail.

Thanks,
Eric

PS: (and perhaps I should have led with this, but...) is it okay to ask these kinds of specific, technical, "help me with my tech-stuff" questions here on Tildes?

Update to the update ... moved update info into a comment ... will keep my progress updated in that primary comment.

Danke, y gracias to all

I'm looking for some feedback on a feasible mechanism for structuring a few API endpoints where a purely RFC-spec compliant REST API wouldn't suffice.

I have an endpoint which returns $child entries for a $parent resource, let's call it: /api/parent/:parentId/children. There could be anywhere from a dozen to several hundred children returned from this call. From here, a child entity is related to a single userOrganization, which itself is a pivoting entity on a single user. The relationship between a child and user is not strictly transitive, but can each child only has one userOrganization which only has one user, so it is trivial to reach a user from a child resource.

Given this, the data I need for the particular request involves retrieving all user's for a parent. The obvious, and incorrect solution to the problem is to make the request mentioned above, and then iterate through and make an API request to retrieve each user. This is less than very good as this would obviously be up to several hundred API calls.

There's a few more scalable solutions that could solve this problem, so any input on these ideas is great; but if you have a better proposal that also works, I'm keen to explore that!

Include user relationships in the call by default.

This certainly does solve the problem, but it's also pumping down a load of data I don't necessarily need. This would probably 2x the amount of bytes travelling along the wire, and in 8 out of 10 calls, that extra data isn't needed.

Have a separate /api/parent/:parentId/users call.

Another option that partially solves the issue: I need data from both the child and the user to format this view, so I'd still need to make the initial call I documented earlier. Semantically, it feels a bit odd to have this as a resource because I don't consider a user to be nested under a parent in terms of database topology.

Keep the original call, but add a query parameter to fetch the extra data

This comes across as the 'least worst' idea objectively, in terms of flexibility and design. Through the addition of the query parameter, you could optionally retrieve the relationship's data. This seems brittle and doesn't scale well to other endpoints where it could be useful though.

Utilize a Stripe expands-style query parameter.

Stripe implements the ability to retrieve all related records from an API endpoint by specifying the relations as strings. This is essentially the same as the above answer, but is scaled to all available API endpoints. I love this idea, but implementing it in a secure way seems fraught with disaster. For example, this is a multi-tenancied application, and it would be trivial to request userOrganization.user.organizations.users. This would retrieve all other organisations for the user, and their users! This is because my implementation of expands simply utilises the ORM of my choice to perform a database join, and of course the database has no knowledge about application tenancy!

Now, I do realise this problem could easily be solved by implementing a GraphQL API server, which I have done in the past, but unfortunately time and workload constraints dictate implementing a GraphQL-based solution is infeasible. As much as I like GraphQL, I'm not as proficient in that area as compared to implementing high quality traditional APIs, and the applications I'm working on at the moment are focusing on choosing boring technology, and not using excessive innovation tokens.

Furthermore, I do consider the conceptuals around REST APIs to be more of an aspirational sliding scale, rather than a well defined physical entity, because let's face it, the majority of popular APIs today aren't REST-compliant, even Stripe's isn't, and it's usually both financially healthier and feature-rich to choose a development path that results in a rough product that can be refined later, than aiming for a perfect initial release. All this said, I don't mind proposals or solutions to my problem that are "good enough". As long as they aren't too hacky! :)