1, the login screen alt + ctrl + f2 enters command mode ;
2, the normal input user name and password;
3, since the command has failed failed, in / usr / bin / sudo / usr / bin / vi / etc / profile modified file
4, restart
reference links: under Linux users can not modify the questions profile after landing
VM error correction / etc / profile file can not log in normally lead
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Origin blog.csdn.net/sinat_15051577/article/details/105315155
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