For a list of available shell commands once you have logged in using your SSH client, type "help". If you would like detailed information on any of the commands listed, type man <commandname>, e.g.: help ls.
Below is a brief overview of some basic shell commands:
cd: Changes the current directory you are in. Use "cd .." to go to the current directory's parent folder.
help: Displays a list of commands available in the secure shell.
ls: Lists the contents of the current directory.
man: Used to display the documentation (manual) for a command, e.g.: man mv.
mv: This command is used to either move or rename files.
pwd: Displays the path to the current directory you are in.
rm: Short for "remove", this command deletes a specified file.
rmdir: This command is used to delete an entire directory.
vi, pico: These are text editors, which allow you to modify text files (such as .txt and .htm files) directly on your site.