Latest Ubuntu related questions

Score: 1
Sheldon avatar
Does LUKS' luksAddKey have a problem with passwords being exactly 64 characters long?
in flag
Ubuntu: 20.04.3 LTS
LUKS Version: 1
Cipher name: aes
Cipher mode: xts-plain64
Hash spec: sha256

I noticed some weird behaviour when using luksAddKey, when the password is exactly 64 characters long. I can't believe that is a bug, so i would like to know, what i'm missing.

The first input of the new password has a length of 64 characters. The second input (=verification) is the first password without i ...

Score: 0
Grep particular word from a line using grep/awk commands
sd flag
lee

I Tried this cmd:

# mount | grep -E '\s/dev/shm\s' | awk  -F "(" '{print $NF}'

Expectations:

rw,nosuid,nodev,seclabel

What I get this:

rw,nosuid,nodev,seclabel)

and I also tried this one:

mount | grep -E '\s/dev/shm\s' | awk  -F "(" '{print $NF}' | cut -c -24
rw,nosuid,nodev,seclabel

I can get the exact wordm but in default there is any one word was not there it will not work so i need to remove this ...

Score: 1
kksagar avatar
Ubuntu hangs due to Xorg process
us flag

I am using Ubuntu 20.04. Once in a fortnight or so, the system hangs, and the system fan goes to full speed at the same time. After that, no keyboard or mouse input works, not even Ctrl+Alt+F3 to switch to a command line console. So there is no way for me to monitor if any background process is malfunctioning. The only choice I have is to use the power button to reboot.

Last time this event repeated, I  ...

Score: 0
Gigiux avatar
I installed firewall-configuration and lost the wifi
eg flag

to keep the PC safe, I installed firewall-configuration from Ubuntu software:

enter image description here

As soon as the installation was over, I lost the WiFi connection (and even Rstudio cannot connect with R, by the way). I removed it with sudo apt-get remove firewall-config but the WiFi is still dead.

How can I reestablish the wifi? and do I need a firewall in ubuntu? and an antivirus? (if yes, is clamAV OK?)

Thanks

Score: 0
TakeMeToTheMoon avatar
Set volume range for qjackctl
es flag

I have that when I turn my qjackctl on, the maximum volume is so high that to listen well, I have to set the volume at about 15%. Can I adjust the range?

Score: 0
Mohammad Reza Moghaddasi avatar
How to spawn an already run process in expect script
cn flag

I've already run a process, for example "fdisk /dev/sda" with the PID of "2000"

Now I execute expect script and I want expect to take control of stdin and stdout of my desired PID (2000) , so I can use "expect" and "send" command and interact with my process.

"spawn" command in expect normally create a process rather than connecting to it. but you can combine it with "open" command from tcl language ...

Score: 2
Helios avatar
How do I gather information to file this specific bug report?
by flag

I am on Kubuntu 21.04. I have a 3080 ti and nvidia-driver-470 installed through apt.

Everything works except when I try to click on the volume tray applet, or launch pavucontrol-qt directly, the entire display server crashes and I'm stuck at a black screen until I switch to a different tty and do sudo systemctl restart sddm

I'm not sure which package the bug belongs to, nvidia, xorg, or pavucontrol.  ...

Score: 2
Bl4d35m1th avatar
Radeon 5450HD card not working until rebooting the system
za flag

System Specs

  • AMD FX 4300
  • AMD Radeon 5450HD
  • 500GB HDD
  • 2x 4GB 1600MHz RAM
  • TA970 Motherboard
  • DELL Monitor connected via VGA

Some Context

  1. I am running Ubuntu 20.04. All current updates installed.
  2. A few months ago, the graphics card's VRAM died. It started working fine after 10 minutes in the oven, though.

Problem

  1. Monitor stays black on boot.
  2. No BIOS startup screen
  3. Can access the system after boot via S ...
Score: 3
Cloudy avatar
Ubuntu 20.04 unexplainable boot failure (stuck at motherboard logo)
us flag

I have a relatively new desktop PC (AMD Ryzen 7 5800X + AMD Radeon RX6700XT, MSI x570 gaming edge WIFI motherboard) that has been working nice with Ubuntu 20.04.3 (single operating system) for months. Today I installed a openssh server (by sudo apt-get install openssh-server) and setup remote desktop server (following instructions in https://c-nergy.be/blog/?p=15733, with command ./xrdp-installer-1.2.1.sh ...

Score: 1
Zi Gang avatar
How to redirect to reverse tunnel server with different port?
jp flag

Setup:
Server A ( Hosted in private network, need VPN access )
Server B ( Public hosted )
Server C ( U can assume is my own macbook )

I use autossh to setup my reverse tunneling at server A
with this command autossh -f -T -M 20002 -o "ServerAliveInterval 10" -o "ServerAliveCountMax 2" -N -R 19999:localhost:22 user@server_b

Then in my Server B
I able to run ssh localhost -p 199999 to connect my server A. ...

Score: 0
yaa__ avatar
How to show icon on context menu?
us flag

Is there a way to show icons in the Context menu on gnome? I'm on Ubuntu 20.04 LTS

Score: 0
how to fix wine not being able to install vcrun2019 with this error: "not supported on this system"?
in flag

trying to run: winetricks vcrun2019

on wine(s):
"wine4.0.4stable-focal"
"wine5.0.1stable-focal"
"wine5.0.2stable-focal"
"wine5.0.3stable-focal"
"wine5.21staging-focal"(the recommended at https://appdb.winehq.org/objectManager.php?sClass=application&iId=17444) "wine6.0.1stable-focal-1"
"wine6.17staging-focal-2"

I always get the below error even if I try manually on the command line wine64 vc_redist.x6 ...

Score: -1
Ubuntu showing more users on Uptime command
hm flag

The "uptime" command on my laptop which is running on Ubuntu 20.04 is showing there is 4 users on my laptop:

Uptime command on my PC

I did search on the internet on how this uptime command works.

According to them, it counts all the active session on terminal.

If I create more window on the terminal the user number will increase.

I created more tabs on my terminal, ran various commands and the number of users remain unchan ...

Score: 2
KJ7LNW avatar
How do libatlas3, liblapacke, and libopenblas0 interact in Focal?
us flag

I'm trying to figure out the interaction between the following library packages:

  • libatlas3-base
  • liblapacke
  • OpenBLAS
    • libopenblas0-openmp
    • libopenblas0-pthread
    • libopenblas0-serial

It looks like the OpenBLAS packages can only be used one at a time because they are in different subdirs shown here. How do I select the active one?

  • /usr/lib/x86_64-linux-gnu/openblas-openmp/libopenblas.so.0
  • /usr/lib/x86_6 ...

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