ubuntu下进入root错误解决方法

1.进入root用户提示su: Authentication failure

roots@ubuntu:~$ su -
Password:
su: Authentication failure

2.通过sudo更改root密码就可以了

roots@ubuntu:~$ sudo passwd root
[sudo] password for roots:
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
roots@ubuntu:~$ su -
Password:
root@ubuntu:~#