jiqing@ThinkPad:~$ su
密码:
su:认证失败
jiqing@ThinkPad:~$ sudo passwd root
[sudo] password for jiqing:
输入新的 UNIX 密码:
重新输入新的 UNIX 密码:
passwd:已成功更新密码
jiqing@ThinkPad:~$ su root
密码:
root@ThinkPad:/home/jiqing# exit
exit
jiqing@ThinkPad:~$ su
密码:
root@ThinkPad:/home/jiqing#
PS: #
On behalf of super user, $
on behalf of ordinary users