Create a Local User in Linux

[root@local host]#useradd    rahul (user name which we have add)

[root@local host]#passwd    rahul

[root@local host]# UNIX password   ******

[root@local host]#retypes   ******

Sudo user:- 

In it all the user how are working as administrator are called sudouser.Sudo are the administrator users by default root is a sudo user. If we want to make any local user as a sudouser then we can make him by making changes in the “vi  /etc/sudoers” .This files contains entries of all the root user.

Su - :- This command is used to login from one user to another user. It is the Switch user command.

Case I^ST :- If we are login on one local user & we want to go another local user then we will write the command “su  –  second user name“after this we will give the password of second user.

Case II^nd:-If we are on a local user and we want tom go to root then we will write “su – “then it will as the password by given the root password. We can login by “su – root” command.