Modify root username on Linux

<title>Modify root username on Linux</title> Modify root username on Linux

If the user name we want to modify is Root_test
Two methods:

1. Modify/etc/passwd/etc/shadow/etc/group
   Change the root of the inside into root_test.
   

   Should not be a safe practice

2. Add a new user with UID 0
   Useradd-o-U 0-g root-m
   

   -M,--no-create-home-o,--non-unique allow to              create users with Duplicate (Non-unique) uid-g,--gid GROUP               name or ID of the primary group of the new account

   passwd Root_test # If you don't give him the code, it's tragic, of course. Sudo permissions can be used
   

   Vi/etc/sudoers
   

   Root        all= (All)   allroot_test   all= (All)   all

   Modify the login shell for/etc/passwd
   /bin/bash ==>/sbin/nologin Disable Login to the original root login
   

   It's like this on the Fedora system.
   

   Root:x:0:0:root:/root:/sbin/nologin

Modify root username on Linux