Linux Tutorial Series – 50 – Recap

Here is the video version, if you prefer it:

Here are all of the commands we have learned: 

• The general command format is: command -options arguments
• Commands are case sensitive
• cd directory to change the directory you are located in (current directory)
• pwd to print the absolute path to the directory you are in
• man command gives you the man pages of the command
• Options can be both short (-) and long (--)
• Use -h or --help to see a quick description of command usage
• ls command lists directory contents
• cp src dest copies from source (src) to destination (dest)
• mv old new renames file with filename old to filename new
• rm item is used to delete the item; rm -r folder to delete the folder
• touch filename to create a new file with name filename
• mkdir dirname to create a new directory with name dirname
• rmdir dirname to remove a directory with the name dirname (the directory has to be empty)
• echo message to print out the message
• cat filename to print out the contents of the filename
• less filename to page through the contents of the filename
• head and tail for viewing only the first or the last portion of a file
• sudo command to execute the command as the superuser
• su to switch user (without an argument switches to the superuser)
• grep pattern file for pattern matching in files
• wc file to count the number of words (and other stuff) in a file – haven’t used it as much

Hope this refreshed your memory!