I keep a cheat sheet here
http://www.cleos-porn-links.com/adul...aster-help.php
Scroll down just a bit to see two different permissions tools.
If you want to change the permissions on a file after you have telneted or SSH in to your server you would type.
chmod 755 NAME_OF_FILE
and then hit return
To do all the files in a directory it is the same but you have to add the reclusive flag like this.
chmod -R 755 NAME_OF_DIRECTORY
and then hit return