Ubuntu 20.04 root 用户启用

一、修改root用户名密码

ubuntu@VM-0-11-ubuntu:~$ sudo passwd root
New password:
Retype new password:
passwd: password updated successfully
ubuntu@VM-0-11-ubuntu:~$ su - root
Password:
root@VM-0-11-ubuntu:~#

二、使能root用户ssh功能

root@VM-0-11-ubuntu:~# vi /etc/ssh/sshd_config

#LoginGraceTime 2m
#PermitRootLogin prohibit-password
PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10