问题:vmware中安装ubuntu过程中没有设置ROOT密码,所以用su密码切换到root用户时报错。
解决办法:用sudo passwd 设置root密码
blueprint@ubuntu :~$ su
Password:su: Authentication failure
blueprint @ubuntu :~$ su password
Unknown id: password
blueprint @ubuntu :~$ su passwd
Unknown id: passwd
blueprint @ubuntu :~$ sudo passwd
[sudo] password for blueprint:
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
blueprint @ubuntu :~$
blueprint @ubuntu :~$ su
Password:
root @ubuntu :/home/blueprint#
root @ubuntu :/home/blueprint#