Ubuntu Input Password Backward system

Tag: Ubuntu interface Console

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1), enter the system (at the interface that entered the password)
2), press and hold Ctrl+alt+f1 (F1~F7 is different mode, the first 6 is the console mode)
3), follow the prompts to enter the user name, password
4), enter etc directory (CD/ETC)
5), edit profile (/usr/bin/sudo VI profiles)
6), delete the problem inside the code you added (check the X key to delete)
7), Save and exit (type shift+: Wq and enter)
8), repeat 2) Enter the window interface password can be


The reason is that the environment variable file is improperly configured to boot into the user interface.

Ubuntu Input Password Backward system