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Sorry it was a typo, _ instead of -, that caused the problem. I want to have a key combination to alter the keymaps. It worked with one for us and one for hu, but now I want to use one key combina...
Using For the console: /etc/vconsole.conf ---- KEYMAP=dvorak For X Session: .xinitrc ---- setxkbmap -layout us -variant dvorak & Problem For the console, it applies the dvorak lay...
An exclamation mark followed by space in the beginning of a pipeline will negate the final exit code of the pipeline. Here's an example in Bash. Echoing $? will print out the exit code of the prev...
How to apply a logical not to a shell command, e.g. in a Bash script? So if the command exited with 0 (success) I would like it to be changed to a non-zero value, and if it exited with a non-zero ...
A file can be created by the human user directly interacting on the laptop, or indirectly by a program. In principle, you cannot detect statically all file creation calls in a software (even if yo...
You could try and convince Linux kernel maintainers, but they are reticent to that. I wonder what they'll do after POSIX.1-202x (Issue 8) possibly will forbid those. Maybe you could patch your ke...
What switches do I need to add to see my video RAM (VRAM) with inxi? inxi -G shows my video card model and other info, but not video RAM.
My assumption has been that shell-scripting is for scripts only, not interactive usage. Whereas shell is everything else, like interactive usage. I wish we could edit these descriptions to clarify...
Suppose I want to limit what characters are allowed in filenames. For example, I want file creation to fail if there is a \n in the name. Is there a way to enforce this? If it matters, I prefer a...
Gnome should have a Settings app with a Keyboard shortcut section. Here you can click Add Custom Shortcut which will let you bind any key to any shell-style command. source Unless you are very sur...
Grove's answer is likewise good, but OpenSSH introduced ProxyJump (-J) in 2016 with v7.3, making it even easier to chain SSH hosts together: ssh -J user@interstitial.example me@destination.example...
It seems like Gnome requires xdg-desktop-portal-gnome. that has been removed to be installed. It turns out that things used to work due to a fallback path that has been removed now. Installing t...
Is there a difference between these two tags? shell shell-scripting In a sense the first could be a bigger category. E.g. If someone wants to create a new shell, then they may have questions...
Is there a way in Ubuntu (22.04) to run a given bash command for a given Key combination in Gnome (42.9)? This Ubuntu is running in Hyper-V on a Win10 host. (I would like to run the setxkbmap us a...
I recently updated Gnome to 1:44.0 and since the update my dark mode settings seem to be ignored for Gnome applications. When setting the dark style in Settings > Appearance, the desktop backgr...
You add a port to the public zone like so: # firewall-cmd --zone=public --add-port=8080/tcp Firewalld knows already many of the commonly used ports, so you might just use the service name inste...
How to open a port when using firewalld as the system firewall?
Suppose I have a PDF which is 2x3 in. I want to create a PDF with a single page, which has multiple copies of this. For example, if the small pieces are in landscape, and the large page is in portr...
You can use rename for this. Many distributions package it; for example, it's apt-get install rename in Debian. In normal usage, it is used to apply an arbitrary regular expression substitution ex...
An easy one-liner in POSIX-compatible shells: for f in *-min.jpg-*; do mv -- "$f" "${f%-*}"; done The only (mildly) tricky concept here is ${f%-*}, which expands to $f minus the shortest suffix...
find . -type f -print0 \ | grep -z -- '-min.jpg-[[:alnum:]]*$' \ | while IFS= read -r -d '' f; do find "$f" -print0 \ | sed -z 's/-min.jpg-[[:alnum:]]*$/-min.jpg/' \ | xargs -0 mv ...
I compressed some JPEGs with curtail it messed up the filenames. It was supposed to only add -min at the end but ended up adding a random string after the extension 😠: prs@PC:/DOWNLOADS/Pictures$ ...
In some cases, when you want to apply a pipeline or a complex command to each file, I find it useful to use while read: find . -type d \ | while read d; do find $d -type f -maxdepth 1 \ | hea...
I'm going to assume that you're using OpenSSH, since that is probably the most common SSH implementation on present-day *nix systems. The easiest is probably to use ssh-keygen -R to delete all kno...
When you first connect to a host, ssh asks you about saving its fingerprint. If you do, on subsequent connections it will check the fingerprint and refuse to connect if it changed. I get that this...
