grub2 – Is there a way to get the Ubuntu bundled AMD RAID (Ryzen) drivers?

After trying to use Ubuntu 16.04, 18.04, and 18.10 to discover and use a RAID 0 array on an AMD motherboard (ASUS Prime B450), I gave it up completely and installed Windows 10 with the drivers offered on its website.

I actually came to the point that the system could detect the RAID and read and write all partitions. After the system has been installed, GRUB will be started, but after the kernel has been loaded, the UUID for the RAID will not be found, as no drivers have been inserted, and will try to do what I did The LiveUSB kernel (inject the driver, recognize the RAID and install it) on the installed system, I did not get any further. Initramfs says it could not find the UUID for the drive, and then switches to a terminal console. It's interesting that I can navigate through the installed files, but the system can not boot. Is there a way to fix this problem? Or maybe ask the Ubuntu development team to bring these AMD drivers into the 18.04.

System Installation – Installing Ubuntu on the VM

I was able to boot and install Ubuntu 18.10 Desktop on VM Workstation Pro 12. Ubuntu has been updated, and it does not become a cmd check-up window when booting, so it just sits there and does nothing. Enter the image description here

Is there something I should do or watch?
The CD / DVD drive is not connected – I even removed it from the settings. When it starts up, the Ubuntu logo will appear for a few seconds and then back to the cmd checklist. Nothing happens in the cmd checklist, I can restart it, but that's it.

unity – Desktop environments in Ubuntu – How to configure / examine what is what?

My Ubuntu 18.04 (updated from 16.04, updated from 14.04 :)) has several desktop environments. I do not know if there are some old relics from previous versions before the upgrade. The default setting ("Ubuntu") remains stuck in the login loop. I can not seem to find any error messages, so I'm having trouble examining the problem. My real problem, however, is that under many desktop environments I do not know exactly what is what? As far as I know, 18.04 was switched to GNOME. But why do I have "Ubuntu" then? If it has been preset since 16.04, this should be "Unity", which is a separate entry. To get a better idea, I'd like to link these labels (GNOME, GNOME on Xorg, Unity, Ubuntu, Ubuntu on Wayland, etc.) to actual packages, processes, log files, and configuration files. Where do I find these configurations? How can I thoroughly investigate issues in different desktop environments?

Tesseract -Tessdata-dir option does not work in Ubuntu 18.04

I'm trying to use the best model from Tesseract. However, I get the following error:

tesseract sample.jpg stdout --tessdata-dir tessdata /
Error opening data file tessdata / eng.traineddata
Make sure that the environment variable TESSDATA_PREFIX is set to your directory "tessdata".
Error loading language & # 39; eng & # 39;
Tesseract could not load any languages!
Tesseract could not be initialized.

Here is the folder structure:

├── sample.jpg
└── tessdata
└── eng.traineddata

Ubuntu version:
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Publication: 18.04
Code name: bionic
tesseract version:
tesseract 4.0.0-beta.1
libgif 5.1.4: libjpeg 8d (libjpeg-turbo 1.5.2): libpng 1.6.34: libtiff 4.0.9: zlib 1.2.11: libwebp 0.6.1: libopenjp2 2.3.0

boot – Ubuntu – Boot Problems – (unknown file system errors) Version 18.04.1 LTS

Yesterday, when an external USB drive was formatted, I thought that I initially made a mistake when I chose the wrong drive. Everything was so good, nothing went wrong at first.

After all that happened, my computer worked fine. I went to bed, woke up today and started working, and everything was fine (I did not turn off last night when I was in sleep mode). However, I tried to install this dev tool and make sure everything worked. I restarted it and it does not start properly, just an "unknown file system" error when I boot.

I used a live USB Ubuntu (Try Ubuntu) to restore and followed some instructions on using the boot repair from: wont-boot /

I did that, trying to reboot, and still ended up with the same file system error. Remember, I've already checked all file systems with Grub's commands to see if they were loaded from the right partition, but they all came up and had no ideas.

How can I tell if a user is idle in an Ubuntu AWS EC2 instance?

We support users on individual AWS instances. It can be expensive to keep them in a running state when the users are idle. Most users operate JupyterHub and / or RStudio

I've written a script that checks for user processes and summarizes the amount of CPU they use. This would be done regularly. We could also check files that are updated in the user's home directory. But we're worried that interactive activities like writing code or interacting with JupyterHub and RStudio will not change files or generate enough CPU activity that our monitoring tracks (which in fact is just sampling the data). We try to prevent our users from losing their jobs when the machines change to the stopped state. I searched the previous questions and found no answers to my specific question. Has anyone successfully addressed this problem or a related issue? Any advice / suggestions would be appreciated. If there is another Stack Exchange site that makes more sense for this question, I'd like to republish it.


I have a computer running Windows Server, and I can access that Windows server from another computer running the Windows operating system using the Firefox browser.
When I try to access it from another computer with the UBUNTU operating system and Firefox browser, I can not do that.
Does anyone know where the problem lies?
Many Thanks