Commands using e2fsck (2)

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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"

seq (argc=2) for FreeBSD

detect partitions
Shows all block devices in a tree with descruptions of what they are.

pretend to be busy in office to enjoy a cup of coffee
Not as taxing on the CPU.

Display the top 10 running processes - sorted by memory usage
A pretty nice display of processes.

Search for a string in all files recursively

Sort files by date
Show you the list of files of current directory sorted by date youngest to oldest, remove the 'r' if you want it in the otherway.

Show git branches by date - useful for showing active branches

Find the package that installed a command

Netcat ftp brute force

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