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1. shift进入recovery模式 2. 选中root账号 3. chmod 666 /dev/null mount -o remount rw / 4. nano /etc/sudoers 恢复本文件内容并存盘。 # /etc/sudoers # # This file MUST be edited with the 'visudo' command as root. # # See the man page for details on how to write a sudoers file. # Defaults env_reset # Host alias specification # User alias specification # Cmnd alias specification # User privilege specification root ALL=(ALL) ALL # Allow members of group sudo to execute any command after they have # provided their password # (Note that later entries override this, so you might need to move # it further down) %sudo ALL=(ALL) ALL # #includedir /etc/sudoers.d # Members of the admin group may gain root privileges %admin ALL=(ALL) ALL |
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