dats an evil code to give just use it pon di ppl u hate
but if you really want to know:
sudo: lets you execute the command as the superuser, ie. root. You usually have to enter your password to be able to continue.
rm: remove. Nuff Said.
the "-f" option when done inconjunction with rm: "Attempt to remove the files without prompting for confirmation, regardless of the file's permissions. If the file does not exist, do not display a diagnostic message or modify the exit status to reflect an error. The -f option overrides any previous -i options." So in other words, very dangerous to use.