Basic Command for Linux

chmod : Change Mode
su : switch user
sudo -r : open a root shell as user

sudo -r -u user : open shell as user

sudo -k : forgot sudo password
head : display start of a file
tail : view the end of a file
less : display part of file
fsck - file system check

REISUB - reboot system
ping : test network connection












ftp : file transfer protocol
host : check IP of domain

traceroute : display route











mount : mount a drive
unmounts : unmounts a drive
fdisk : format disk
dd : duplicate disk
df : disk free space
passwd : create password