Sudo – run as administrator
Su – (substitute user) execute commands with privileges of the root account
Pwd – shows the full pathname of the current directory
Ls – lists computer files and can be invoked with other arguments
Ls -l – lists specific contents of directory
Ls -la – another useful command similar to -l but with more details
Ping – in networking, same as Windows a powerful tool for checking connectivity. In Linux we have to manually stop the command, we use Ctrl + C to do that
Traceroute – in networking, another powerful tool for checking how many hops till the destination
History – shows the history of the commands types
Clear – clears the screen
Reboot – reboots the machine
Shutdown now – turns of the machine