ubuntu如何创建root用户

1、系统信息

liujiaxin01@liujiaxin01-virtual-machine:~/Desktop$ lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 20.04.2 LTS
Release:    20.04
Codename:    focal

2、创建root用户

liujiaxin01@liujiaxin01-virtual-machine:~/Desktop$ sudo passwd root
New password: 
Retype new password: 
passwd: password updated successfully

3、切换至root用户

liujiaxin01@liujiaxin01-virtual-machine:~/Desktop$ su - root
Password: 
root@liujiaxin01-virtual-machine:~# whoami
root