Linux Create root account

Method one. If you already have a regular account and want to upgrade it to the root type of account, follow the procedure below.

vi/etc/passwd

The UID and GID of the user who will be modified are set to 0. Save.

Method Two. If you want to create a root-type account directly, for example, if I create an account called Yuri, execute the following command under the system root account:

Useradd-u 0-o-G root-g root-d/yuri Yuri

This allows you to create a root-type account. Then set the password:

passwd Yuri

You will be prompted to enter your password two times. Success.

Command parsing:

-U 0: Specifies that the UID is specified as 0 (0) as root, and the prompt after login is # instead of $.
-O: This parameter must be specified because the UID is duplicated (repeat with the root account uid).
-G Root: The group name of the initialization group, when the user belongs to more than one group, (as specified in the-G parameter), the group in which the login is located. By default, the system creates a new group with the same name as the user name, and is set to the group name when it is initialized. Regardless of which group-G is specified.
-G root: Specifies the list of groups to which the user name belongs, a user can belong to more than one group, the group name is separated by commas, and the group name must already exist.
-d/yuri: Specify the user's home directory
Yuri New user name Yuri

Reference: http://blog.chinaunix.net/uid-22166872-id-3551122.html

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Linux Create root account