Show Recursive Count Total Number Of Files In Folders

for i in *; do echo -n "$i: "; find $i -type f | wc -l; done

Kill All Specific Processes Returned From Process List

Let's say you want to kill many specific processes from the output of PS

kill -9 $(ps aux | grep process_to_kill | awk '{print $2}')

This is handy when there isn't a fixed process/application handle that works with "killall -9"

Detect Orphaned MySQL Databases On Linux Running cPanel

This script relies on databases being in the following format:
username_database-name

...and located in:
/var/lib/mysql

cd /var/lib/mysql
for I in `ls -d */ | grep '_' | cut -d '_' -f 1 | uniq`
do
if [ ! -d "/home/$I" ]; then
    echo User $I doesnt exist - databases to be cleaned up!
fi
done

This should be used with caution and user existence manually verified but will give you a starting point.