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Replace all in last command

Remove all mail in Postfix mail queue.

Generate a random password 30 characters long
Find random strings within /dev/urandom. Using grep filter to just Alphanumeric characters, and then print the first 30 and remove all the line feeds.

A fun thing to do with ram is actually open it up and take a peek. This command will show you all the string (plain text) values in ram
cat? dd? RTFM

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Compute running average for a column of numbers
This is an on-line algorithm for calculating the mean value for numbers in a column. Also known as "running average" or "moving average".

Dump mySQL db from Remote Database to Local Database
You can use this to dump you database from remote db to your local db.

start a VNC server for another user

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")'

Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously


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