Last login: from 216.73.216.222
:~$ pwd #pwd stands for Print Working Directory
/home/guest
:~$ cd / #cd stands for Change Directory, here we change to the root directory(/)
:/$ pwd
/
:/$ ls #ls stands for LiSt, which lists files and directories in current directory
bin dev home lib32 libx32 media opt root sbin sys usr
boot etc lib lib64 lost+found mnt proc run srv tmp var
:/$ apt update #refresh the list of available packages to ensure we get the latest package later (apt can only be used on Debian based linux distros)
Permission denied
:/$ sudo !! #!! means the previous command, it's quite useful when we forget to use sudo (Super User DO)
sudo apt update
:/$ sudo apt install vim