Ceci est une ancienne révision du document !
Welcome back to another edition of Questions and Answers! In this section we will endeavour to answer your Ubuntu questions. Be sure to add details of the version of your operating system and your hardware. I will try to remove any personally identifiable strings from questions, but it is best not to include things like serial numbers, UUIDs, or IP addresses. If your question does not appear immediately, it is just because there is such a lot, and I do them, first-come-first-served.
So, back in the day when Visual Basic 6 arrived on the scene, my boss sent us on a course at Damelin College. It's not that we really programmed anything, we used Visual Basic for making front-ends. When I say this I mean you click a button instead of physically flipping a switch. This in turn flipped on or off a PLC rule. The only advantage this had over a physical switch is that it logged “when”. (Basically, proving operator error.) At this course, there were a bunch of guys – I suspect they were like day labourers, as they were the blinken lights-type. Looking back, I should have objected to these guys in a non-basic (not as in visual basic, mind you) course, but hindsight is 20-20 vision. The problems manifested right away when the instructor said “click on the VB6 icon on your screen”. Mice were lifted onto CRT monitors and buttons were clicked. This was the red flag I should have tossed my toys at, as it basically took them 5 weeks to master the mouse in the 6-week course, ruining it for everyone else. The large company behind them and the college's greed, kept them in pace. Out of our 400-page curriculum, we did “tic-tac-toe” and nothing else. Even though those of us managing to complete the exam got our certificates, the whole thing was a sham. I have started with a new company and we have unlimited access to Udemy. Now that I can freely look at things, I find many (if not most!) of the courses are rehashed Youtube videos, or old book chapters 1-3. Not a single original thought between them. Guys, don't be afraid to leave 1-star reviews and demand a refund. Look through the video's as soon as you have ordered your course and immediately demand a refund if it fits the rehashed horseradish criteria. Don't feel you need to finish the course, find another. Don't feel because you learned “something” it was worth it, that is what some of the sharks prey on.
Q: I tried to install FreeCAD 0.20 in Jammy Jellyfish, but it has not been updated yet. I am not really a fundie, so help me get the decent version set up please?
A: I found a forum post on that here: https://forum.freecadweb.org/viewtopic.php?t=59647 - it seems it was released on the 14th, remember Ubuntu needs to test it first before just adding it to the repo. That said, you can always grab the appimage so long or add a PPA: https://launchpad.net/~freecad-maintainers/+archive/ubuntu/freecad-daily
Q: I need to upgrade my crappy computer. I have WattOS running (based on Ubuntu), but I need newer software to run on here. The forums are online, but when you try to access them, there is a “not acceptable” error message. If I just add the Ubuntu repositories, can I update?
A: Probably not. WattOS has been discontinued for a while. Maybe look at Linux Lite as a replacement? I don't know how energy efficient it is, but it is lighter than standard Ubuntu.
Q: What are your thoughts on 'http://www.pixeluvo.com/' ?? Is it worth the $34 ?? In the documentation, it says it can do it all with a brush, The Fx Brush Tool allows you to paint the effect of some common filters onto an image. This can be incredibly useful for touching up photos or applying effects in very specific portions of an image. The filters you can currently use to paint with are: Saturate, Desaturate, Colorize, Blur, Sharpen, Surface Blur, Boost Detail, Boost Clarity, Smooth Skin. Simply select the desired effect, adjust the effect settings in the options bar, then paint with the filter directly onto the image.
A: Honestly, $34 is easy for someone earning dollars or euros, but way too expensive for other people living outside those zones, so I would not know, as that is more than I am willing to pay for software. If you are in one of those zones. I'd say go for it. From what I can see on the website, it looks like a nice program.
Q: I upgraded Ubuntu all the way from 16.04, right up to 20.04. All seemed well until I tried to log in and it would not let me. I went and changed the password, thinking I made a slip-up with the typing, but I still can't log in. <removed> is what I can gleam. Either that or my login is in a loop?
A: You are out of space. Delete something. I suggest removing old kernels and doing a sudo apt autoclean and autoremove. Maybe look at Stacer once you are back in to keep it clean?
Q: Hey, I wanted to try 22.04 and did 'update-manager -d'. I then saw: “Welcome to the Ubuntu 'Jammy Jellyfish' development release”, and I was like: Huh? Seeing “This release is still in development.” has me wondering maybe I installed the wrong version?
A: Man pages, young person! update-manager has the -d for a reason. It is short for “devel-release”. Don't blindly copypasta things if you are unsure.
Q: I recently got a Radeon RX570 card off gumtree, second–hand, and then after my last update, I am seeing red vertical lines on my screen. I tried my brother's screen and it is the same. How can I go back to before this update? I don't want to reinstall as there are things I want to keep.
A: I tried to fix your question as it made no sense what you wrote: Red lines down the screen are not usually software related. Take your card out and re-seat it in your slot. You can use an eraser to clean the contacts on the card. Also swap your cable, it could be a bad solder. Also check that everything is plugged in tightly. Lastly, boot off an install disk and *if the red lines are still there, it is not software. Problem is, guys mine crypto with those and they run at 100% capacity all the time, they are bound to wear out.
Q: My bluetooth on my Ubuntu machine suddenly switched from headphones to the bluetooth soundbar downstairs. How can I avoid this in future as it puts me in a bad light?
A: “A bad light”??? Stop watching porn? Remove the soundbar from the Bluetooth window.
Q: I have LL 20.04 installed, and it seems to want to remove my Nvidea drivers. If I do a sudo apt autoremove it lists the drivers and I did that before and had no display. Help?
A: Don't remove them. This will come right down the line. Linux lite 6.0 was released last week and there are bound to be bugs.
Q: Hai, I started learning PHP and wanted to install codelite as per the book, but it says it does not exist. I know it does, as I installed it on the debian VM we were given in college. The problem is that the VM is too locked down for my liking and I want to do my own thing.
A: It's muddy waters, it needs an extra repository, see here: https://docs.codelite.org/downloads/download/#ubuntu-debian – just follow these instructions, it should then install normally.
Q: OK, I'm not gonna lie, I sort of fell asleep at my desk and may have pressed something I should not have, if you know what I mean. My file explorer is now without the tree view on the side. It's not so much of an issue as I have the full path set up on top, but I'd like to see it again.
A: It's right there in the hamburger menu (Show sidebar) if you use “files”, but you did not say which DE you are using. Let me know which version, then we can take it from there as there are a lot of file managers out there.
Q: I uninstalled the snap store as I don't want slow software, plus I have only a 128GB WD SSD in my laptop. It is a first gen i5 so it is rather slow. The issue I have now is that I have no GUI way to install software. Even trying sudo apt install chromium does not work.
A: Sorry for cutting that, the rest was not relevant. You do know there are other software stores out there, you do not have to use only one. Here is a nice list: https://askubuntu.com/questions/339697/are-there-alternatives-to-software-center
They may not all work, but AppGrid does, I tested it.
Q: I have std Ubuntu 20.04, and I tried installing cuda, then got this gem: The following packages have unmet dependencies: cuda : Depends: cuda-11-7 (>= 11.7.0) but it is not going to be installed E: Unable to correct problems, you have held broken packages.
A: You will need to fix your error first, try apt-get autoclean and apt-get update and apt-get upgrade first, followed by apt-get -f install .
Just Google “how to fix broken packages Ubuntu” if the above does not work for you.