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journalctl -f
a tail -f variant of systemd journal. Follow the most recent updates or if events are appended to the journal

Recursively remove directory with many files quickly
rsync'ing an empty directory over a directory to be deleted recursively is much faster than using rm -rf, for various reasons. Relevant only for directories with really a lot of files.

Compute the average number of KB per file for each dir
Use this to find identify if dirs mostly contain large or small files.

Increment the filename of png in a given directory by one

For when GUI programs stop responding..
man xkill

Produce a pseudo random password with given length in base 64

Quick command line math
expr will give you a quick way to do basic math from the CLI. Make sure you escape things like * and leave a space between operators and digits.

Search for a string inside all files in the current directory
This is how I typically grep. -R recurse into subdirectories, -n show line numbers of matches, -i ignore case, -s suppress "doesn't exist" and "can't read" messages, -I ignore binary files (technically, process them as having no matches, important for showing inverted results with -v) I have grep aliased to "grep --color=auto" as well, but that's a matter of formatting not function.

Clone all repos from a user with lynx
https://wuseman.github.io/wcloner/

Grep inside Vim and navigate results
Will search for the given pattern and build a list of occurrences. Then you can use :copen and :cclose to toggle the list. When browsing the list, ENTER will take you to that line in the file.


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