linux-desktop - ubuntu 更改用户名，改了/etc/passwd最后一行的username后root密码就不能用了

Question

sudo vim /etc/passwd 改了最后一行

tiny:x:1000:1000:tiny,,,:/home/tiny:/bin/bash

tiny变成abc

abc:x:1000:1000:tiny,,,:/home/tiny:/bin/bash

退出之后,发现root密码不能用了。比如，我尝试了sudo apt-get update
就变成

[sudo] passwork for abc　

密码错误了
ls ～ -la 后发现变成这样了：
drwxr-xr-x 28 abc tiny 4096 Apr 6 03:04 .

登录tty1文字界面用户名不管时abc 还是原来的tiny都不能用了。

请问这该怎么办?

Answer 1

Reboot into recovery mode, select root, and then change the files back to their original appearance. That's it.

Answer 2

/etc/shadow must also be changed to abc, otherwise it will not match, and /etc/sudoers must also be changed if it is set with the same user name. It is best to delete it and add a new user.