Posts by r~~
Using systemd timers is too much work? Not with systemd-run! systemd-run --user --on-active=10min some_cmd
The ** pattern is an extension to, not a part of, the POSIX glob syntax. While it has emerged as an informal standard, AFAIK there is no single standard to reference to describe what it does. This...
Unix systems are made out of many small tools that focus on specific tasks but are general enough that the investment made in learning their specific switches and hotkeys pays off over many applica...
but it clearly does see that change. Nope. Your environment is being reloaded in the sudo process. sudo echo $PATH gives the same result as echo $PATH because $PATH is expanded by your shell ...
Here's an alternative that is a one-liner drop-in for your existing script: eval set -- $(printf "%q\n" "$@" | sort -u) It works by escaping the initial arguments, piping the escaped arguments ...
This is an ideal case for ImageMagick. Given input.png: Running this command: convert input.png -draw 'fill yellow fill-opacity 0.5 polygon 50,50 100,30 150,50 100,150' output.png Produces ...
Have a look at Xpra. I only use it locally but it's intended to forward from remote hosts as well.
Especially in a pedagogical context, the issue with something like cat /dev/random | head -c 20 versus the more straightforward head -c 20 /dev/random is that it communicates that extra ceremony is...
From man xxd, the section on the -r flag (emphasis added): -r | -revert reverse operation: convert (or patch) hexdump into binary. If not writing to stdout, xxd writes into its output file with...
From man ssh_config: This file is used by the SSH client. Because of the potential for abuse, this file must have strict permissions: read/write for the user, and not writable by others.
You want shuf. shuf -n1 -i 534-876874
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...
They are broadly analogous; there's a lot of cross-pollination of ideas between the projects. Some terminology first, because you'll notice that both columns have duplicate entries and this often ...
Authentication events such as logging in are ultimately handled by PAM, the Linux Pluggable Authentication Modules project. PAM is very flexible and different Linux distributions will ship with dif...
I vote against the merger. It's true that any LS question is likely to be on topic for PU, at least as I understand the scope of the latter, not being a participant in that community. However, I h...
I wasn't there two decades ago when the spec was first being developed, but based on other parts of the spec they're clearly attempting to establish a parallel with /usr/local. The intended minimal...
Is this what you want? Edit: Credit to Kamil Maciorowski for catching an unsafe interpolation in the previous draft; it will work for non-adversarial inputs but this newer version is safer and a ...
In Bash, you could use the $COLUMNS environment variable to detect the width of your terminal and truncate each line to that length in your sed script. Something like this should work: sed "s/^\(....
I've done this exact thing with these same tools, as recently as this morning. I use strace to measure file access sometimes; trouble is, a lot of programs/libraries will attempt to look for a lot...
This isn't exactly what you asked, but the letters-too-small problem could also be solved by using a larger console font. Here is a decent overview of how to change console fonts, though I don't k...
That bar is part of GNOME Shell, and user applications don't get to mess around with the shell. You need to look into writing shell extensions to modify that in a general way. One common thing for...
You can't, without patching readline. What counts as a word character is hard-coded in the readline library, as of this writing. See: https://git.savannah.gnu.org/cgit/readline.git/tree/vi_mode...
You can fake out git as long as you have some empty Git repository available somewhere. git --git-dir=path-to-empty-repo/.git \ ls-files --others --exclude-standard
Answering your question as written, this is a hardware-specific question. Since solid-state storage chips typically keep the details of which cells are being used to write data hidden from the OS, ...
