Bash
From charlesreid1
Bash Guide
Startup Process
Dot Files
Tricks
Looping
Looping in bash is really simple, and convenient - you can use other unix commands (most obviously "ls") to create lists, and then loop over each element of those lists. For example, if I want to print out the name of every file in my home directory (granted, not very useful, but this is just an example), I can do this:
for i in `/bin/ls -1 $HOME`; do
echo $i
done