⇐⇐⇐ linux commands ⇒⇒⇒

passwd

this is the command for changing the password this is the simplest way. 

sudo

all the linux users use this commands 1000+ tyms 

sudo=super user or a root user 

the main user(root) 

if u are a normal user u cant do some works like changing permisions so that we use sudo command

reboot

very simple command reboot is use to reboot ur system

clear

this command is used to clear visibleconsoles

already we seen some basic commands

ls , cp , mv , rm mkdir , touch

now we see some sub commands

-l  detailed list

-a display hidden files

-i waiting for conformations

-r copies recursives

-b creates backup copy of the sourcefile before removing

-i wait for conformation before delete

-s create a symbol link

u user

g group

o others

r read

w writer

x executes

                                               thank u