Most powerful examples of Unix commands or scripts every programmer should know

Question

There are many things that all programmers should know, but I am particularly interested in the Unix/Linux commands that we should all know. For accomplishing tasks that we may

Answer 1

The fact you can use -name and -iname multiple times in a find command was an eye opener to me.

[findplaysong.sh]

#!/bin/bash
cd ~
echo Matched...
find /home/musicuser/Music/ -type f  -iname "*$1*" -iname "*$2*" -exec echo {} \;
echo Sleeping 5 seconds
sleep 5
find /home/musicuser/Music/ -type f  -iname "*$1*" -iname "*$2*" -exec mplayer {} \;
exit