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16 votes

How to solve a temporary failure in name resolution error?

There are different possible reasons for a failure in name resolution. You don't have any internet connectivity. Try ping -c4 8.8.8.8 If you get answers, then your internet connection works. Else ...
RalfFriedl's user avatar
  • 9,051
14 votes

How to get near-perfect screen recording quality?

I've had success with: ffmpeg -f x11grab -video_size 1920x1080 -framerate 30 -i :1 \ -vcodec libx264 -preset ultrafast -qp 0 -pix_fmt yuv444p \ video.mkv Key points: -qp 0: x264 ...
hdante's user avatar
  • 253
11 votes

ssh-agent not getting set up (SSH_AUTH_SOCK, SSH_AGENT_PID env vars not set)

For the $ eval `ssh-agent -s` construct to work when put in a “startup script”, your session, and ultimately the terminal where you expect the environment, must be descendants (by fork and exec) of ...
stefan's user avatar
  • 1,111
10 votes
Accepted

WiFi not working Kubuntu 20.04 - Intel 8265 Network Interface

If you have a dual-boot machine with a recent version of Windows and started seeing problems during initialization of the WiFi device when booting Linux, the problem could be due to the “fast startup” ...
binarysta's user avatar
  • 3,082
10 votes

How to use 5.16 kernel with Ubuntu 21.10?

Here's how I got it to work, it's similar to @airium's answer but with the exact commands I used: Find the correct kernel version here; I chose 5.16.11. Download the generic versions of the driver ...
serg06's user avatar
  • 201
9 votes

How to use virtual serial port without root privileges?

I found an answer after pouring through the man page for socat. You can add mode and group to the attributes of your pty by adding a few more expressions to your command line. To follow your example, ...
Efpophis's user avatar
7 votes
Accepted

LAPACK make fails: "recipe for target 'znep.out' failed" error

After attending to a HPC lecture and doing some research I had the answer. It looks like the kernel associates a certain amount of memory to the compilation processes. This feature helps in some ...
Joshua Salazar's user avatar
7 votes
Accepted

How to use 5.16 kernel with Ubuntu 21.10?

WARNING: the below method may break your system. You have been warned. Ubuntu mainline kernel 5.15.7+ and 5.16 bumps the requirement from libssl1.1 (>= 1.1.0) to libssl3 (>= 3.0.0~~alpha1). You ...
airium's user avatar
  • 86
6 votes
Accepted

How to use virtual serial port without root privileges?

I don't fully understand why you need a virtual serial port at all. What happens if you just telnet 10.0.0.1 4030? Next thing is to run socat without sudo as normal user and pick a path that's ...
dirkt's user avatar
  • 32.6k
6 votes
Accepted

Can't install a package with 'revision number is empty' message

Unfortunately the libcrafter package wasn’t built correctly: its version is given as “0.0.2-”, which isn’t an acceptable version number in Debian (as specified in the relevant section of Debian policy)...
Stephen Kitt's user avatar
5 votes

How to restart KDE window decorations without loosing the running X session

Here is the updated answer for KDE 5: kwin_x11 --replace
Ivan's user avatar
  • 18k
5 votes

how do i map the cmd key to ctrl on kubuntu 18.04?

To remap the keyboard in KDE Plasma, Open the start menu Search for "Keyboard" Open the application the icon titled "Keyboard" Switch to the "Advanced" tab Look for "Ctrl position" Open the drop ...
5cans's user avatar
  • 51
5 votes
Accepted

Increase System Tray Icon Size in KDE

Open ~/.config/plasma-org.kde.plasma.desktop-appletsrc with a text editor. Find every line starting with extraItems= Add another line iconSize=3 below each of those. Save the edited file and ...
K7AAY's user avatar
  • 3,876
5 votes

Kubuntu 20.04 Shutdown/Reboot Hangs At "Waiting for process: crond"

Cron can hang if one of its jobs is hanging (for example if you have a misconfigured log rotation, etc.). To find the culprit run pstree before you reboot to see if any processes are active/hanging: ...
laktak's user avatar
  • 6,054
4 votes
Accepted

Install Fortran 90 compiler in Kubuntu

Fortran 95 is a superset of Fortran 90. A Fortran 95 compiler will quite likely be able to compile your Fortran 90 code. To install the GNU Fortran compiler from kubuntu use: sudo apt-get install ...
Alex338207's user avatar
4 votes
Accepted

Ideas how to get my usb audio interface to work with Linux?

As of 2017 / 2018 (e.g., Linux kernel 4.X or above), this device works without any special drivers. I'm using it in Arch Linux now without any problem. However, Focusrite released a new version, the ...
MountainX's user avatar
  • 18.2k
4 votes

How to solve a temporary failure in name resolution error?

If you are using VMWARE running linux vm on windows, my experience maybe helpful: systemctl restart NetworkManager.service It happens when you havn't shut down your vm correctly.
qloveshmily's user avatar
4 votes

Increase System Tray Icon Size in KDE

Debian 11, KDE Plasma In order to increase the size of systray icons, you need to edit the file /usr/share/plasma/plasmoids/org.kde.plasma.private.systemtray/contents/ui/main.qml Find the string ...
LnxUser's user avatar
  • 41
4 votes

How to disable all global hotkeys in KDE Plasma?

I've found a way to disable all the global shortcuts of KDE. Here's what I did: The hotkeys are saved in ~/.config/kglobalshortcutsrc in the form of foo=bar assignments. Using sed, replace the ...
Utkarsh Verma's user avatar
4 votes

Kubuntu 20.04 Shutdown/Reboot Hangs At "Waiting for process: crond"

Same problem on my Xubuntu 20.04 since 2 weeks. In order to find out the origin of this message displayed at shutdown Reached target Reboot. systemd-shutdown[1]: Waiting for process: crond I used ...
Gilles Gaido's user avatar
4 votes

Kubuntu takes more than 2 minutes to boot!

Ok, I think I figured out your problem; the system looks for the resume partition, which is the swap actually and was changed. When you boot do you see a graphic screen? Press something to view ...
Krackout's user avatar
  • 2,742
4 votes
Accepted

Accidentally moved /usr now kde is broken. Do I need to re-install?

Use a live session to move it back from /home/ to /usr/ In /home/ there should only be users and that tends to be 1 on de desktop so should be easy to do. Even if you moved it to /home/$USER/ not a ...
Rinzwind's user avatar
  • 290
4 votes

where in the FHS does command less store its buffers?

less doesn’t store buffers anywhere in the file system. Its buffers, configurable using the --buffers and --auto-buffers options, are kept in memory (potentially in swap).
Stephen Kitt's user avatar
4 votes
Accepted

Open Konsole terminal always in split view

The following should work. Create a json file (filename layout.json or any filename you want) with this content: { "Orientation": "Vertical", "Widgets": [ { ...
Edgar Magallon's user avatar
3 votes

Why is Linux kernel killing processes when it has 14GB free memory, and how to fix it?

To your questions: Why: You are probably using Kernel 4.4.0-59. If so you are affected by a OOM bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655842. How to fix it when this happens again:...
Nicolas Bigler's user avatar
3 votes
Accepted

Errors were encountered while processing: /var/cache/apt/archives/linux-image

I had to remove the old kernels. Thanks to @JeffSchaller for helping me to understand this. To accomplish this I used this link titled: RemoveOldKernels - Community Help Wiki. This is from the ...
ka3ak's user avatar
  • 1,265
3 votes

How can I stop windows re-positioning after waking up monitors?

Use this simple shellscript before and after suspend: #!/bin/bash # Get the coordinates of the active window's # top-left corner, and the window's size. # This can be saved & loaded getpos(){ ...
Ipor Sircer's user avatar
  • 14.7k
3 votes

Set the time of notifications in Plasma 5

The other answer is a successful hack, and I upvoted, but I have found a better one for some versions of KDE, and also add the instruction to refresh plasmashell, which also needs to be done for the ...
Starman's user avatar
  • 155

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