CentOS Add User

Test Environment: CentOS 6.0

1, add the user, first with the AddUser command to add a normal user, the command is as follows:

#adduser Tommy

Add a user named Tommy

#passwd Tommy//Change Password

Changing password for user Tommy.

New UNIX Password://Enter your password here

Retype new UNIX Password://Enter password again

Passwd:all authentication tokens updated successfully.

2. Give root permission

Method One: Modify the/etc/sudoers file, locate the following line, remove the previous comment (#)

# # allows people in group wheel to run all commands

%wheel all= (All) all

Then modify the user to belong to the root group (wheel) with the following command:

#usermod-G root Tommy

After the modification, you can now log in with your Tommy account and then use the command su– to get root permission to operate.

Method Two: Modify the/etc/sudoers file, locate the following line, and add a line under root as follows:

# allow ROOT to run any commands anywhere

Root all= (All) all

Tommy All= (All) all

After the modification, you can now log in with your Tommy account and then use the command su– to get root permission to operate.

Method Three: Modify the/etc/passwd file, locate the following line, change the user ID to 0, as follows:

Tommy:x:500:500:tommy:/home/tommy:/bin/bash

Modified as follows

Tommy:x:0:500:tommy:/home/tommy:/bin/bash

Save, with Tommy account login, directly get the root account permissions.

Friendly reminder: Although method three looks simple and convenient, but generally not recommended use, recommended method two.

Disclaimer: Reprinted from Http://www.2cto.com/os/201112/113227.html

CentOS Add Users