System Info

• man (Manual) man command – show the manual for command
• clear Clears information on the display screen to provide a blank slate
• date show the current date and time
• cal show this months calendar
• w display who is online
• whoami who you are logged in as

Navigation

• ls -l Displays a long list vertically with file permissions, date modified and file name (linux)
• ls -la Displays all files (linux)
• ls -al formatted listing with hidden files (linux)
• cd Change Directory
• cd ~ Return to home directory
• .. Go up one level / directory

File Manipulation

• mkdir dir create directory dir
• touch filename.extension Make a new file of filename at current location. Extension must be included.
• rm file delete file
• rm -r dir delete directory dir
• rm -f file force remove file
• rm -rf dir force remove directory dir

SSH

• ssh user@host connect to host as user
• ssh -p port user@host connect to host on port port as user
• ssh-copy-id user@host – add your key to host for user to enable a keyed or password-less login

References

David Baumgold: command line tutorial