Here are some other commands that are useful to know.
|clear||Clear the screen|
|echo||Display text on the screen. Mostly useful when writing shell scripts.
echo “Hello World”
|more||Display a file, or program output one page at a time.
ls -la | more
|less||An improved replacement for the “more” command. Allows you to scroll backwards as well as forwards.|
|grep||Search for a pattern in a file or program output. For example, to find out which TCP network port is used by the “nfs” service, you can do this:
grep nfs /etc/services
This looks for any line that contains the string “nfs” in the file “/etc/services” and displays only those lines.
|lpr||Print a file or program output.
lpr mp3files.txt (Print the mp3files.txt file)
ls -la | lpr (Print the output of the “ls -la” command)
|sort||Sort a file or program output.
|su||“Switch User”. Allows you to switch to another user’s account temporarily.
The default account to switch to is the root/superuser account.
su - (Switch the root account)
su - (Switch to root, and log in with root's environment)
su larry (Switch to Larry's account)