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One liner to kill a process when knowing only the port where the process is running
-k (kill option ) . To kill all processes accessing this port

find . -name

1+2-3+4-5+6-7 Series

list processes with established tcp connections (without netstat)
Uses lsof to list open network connections (file descriptors), grepping for only those in an established state

Print macOS current power delivery max wattage
Print the max wattage of the current power draw source for a Mac. Note that the current amount of watts drawn may be lower, particularly if a high-wattage adapter is plugged into a Mac that has a full battery.

Generate a binary file with all ones (0xff) in it
This is similar to how you would generate a file with all zeros $ dd if=/dev/zero of=allzeros bs=1024 count=2k

useless load
check your load with top... Start more of these jobs to get an multi-core cpu busy...

Get table column names from an MySQL-database in comma-seperated form

Continue a current job in the background
Continue a current job in the background and detach it from current terminal

Backup entire directory using rsync


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