How to create a secondary root user on CentOS
|# useradd newuser|
set a password for the new user
|# passwd newuser|
Once done, edit the ‘passwd’ file
|# vi /etc/passwd|
set the UID:GUD bits to 0:0. Say for example the new user is ‘admin’, the line should look like
Note: This method increases the security risk on the server and the best method is to add the new user in the sudoers list. You can also allow a list of commands for the new user beyond which he won’t be able to execute any commands as root.