The Basic Commands for Linux
sudo
To give the administrators privilege
sudo apt-get upgrade
To update the system
uname
For the name of the user logged in
sh
To get the shell
echo $0
Gives the name of the shell
uname-a uname-r
User names
echo $PATH
Displays the path
w
The basic information the system, like uptime, load, number of users
uptime
Displays the uptime of the system
uptime -p
Displays the time alone the uptime
man
Manuals of the commands
hostname -i
Gives the host ip address
mkdir
To create a directory
rm -r
To remove one or more directories