In Lab 4, I will show how the following commands operate:

chmod

The chmod command is use to change the mode or permission of a file or directory.

su

The su is the command that allows you to log in as another user.

sudo

The sudo command allows you to execute command  as a different user. usually a superuser in a controlled way.

chown

The chown command is use to change the owner of a file.

passwd

The passwd is the command use to change the password of the account logged in.

ps

The ps  command is use to view a snapshot of the processes currently running in the system.

kill

The kill command is use to terminate a specific process in the system that is currently running.

printenv

The command printenv is use to display a list of the environment variable.