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Shell function to exit script with error in exit status and print optional message to stderr
USAGE: die ERRNUM [MESSAGE]

Use last argument of last command
Bash shortcut to work with the last argument of your last command

Exclude grep from your grepped output of ps (alias included in description)
Surround the first letter of what you are grepping with square brackets and you won't have to spawn a second instance of grep -v. You could also use an alias like this (albeit with sed): alias psgrep='ps aux | grep $(echo $1 | sed "s/^\(.\)/[\1]/g")'

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"

posts an xml file to a webservice with curl

Gets WAN ip address directly from DGN2200 router.

list files recursively by size

find xargs mv

List packages manually installed with process currently running
Sometimes we install programs, we forget about them, and they stay there wasting RAM. This one-liner try to find them.

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"


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