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For when GUI programs stop responding..
man xkill

Print github url for the current url
Works for repos cloned via ssh or https.

syncronizing datas beetween two folder (A and B) excluding some directories in A (dir1 and dir2)

Make a dedicated folder for each zip file
${f%*.zip} strips off the extension from zip filenames

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Delete empty directories recursively

Display the end of a logfile as new lines are added to the end

Rotate a video file by 90 degrees CW
Change video orientation in metadata only

List last opened tabs in firefox browser

tell if a port is in use
if you don't do --numeric-ports, netstat will try to resolve them to names

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