The command su gives the user full access as an administrator and can install and update system.
The command cp is used to copy files and folders.If the folders have multiple files;the argument r is to be used.
cp /home/xy /opt -r
This command is used to move the files,equivalent of the cut command in windows
This command is used to delete the files
this command is used to view the configuration files in the command line.
This command is used to shutdown the system
This command is used to restart the system.
This command is used to stop the process.
ps displays information about a selection of the active processes
usage:to see the every process
This command is the system help utility and gives reference manuals on all process and applications.