（一）更改权限
chmod 740 /etc/sudoers
（二）赋予用户权限
1、sudo gedit /etc/sudoers
2、添加你的用户名
Defaults env_reset
Defaults mail_badpass
Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
# Host alias specification
# User alias specification
# Cmnd alias specification
# User privilege specification
root ALL=(ALL:ALL) ALL
# Members of the admin group may gain root privileges
min ALL=(ALL:ALL) ALL
# Allow members of group sudo to execute any command
%sudo ALL=(ALL) ALL
xx ALL=(ALL) ALL (将此处的XX修改为出现改问题的用户名！）
（三）保存后，即完成。