修改/etc/sudoers文件出错导致问题解决方案

出错实例

>>> /etc/sudoers: syntax error near line 21 <<<
sudo: parse error in /etc/sudoers near line 21
sudo: no valid sudoers sources found, quitting
sudo: unable to initialize policy plugin

之后尝试使用

• pkexec visudo又报错

  ==== AUTHENTICATING FOR org.freedesktop.policykit.exec ===
  Authentication is needed to run `/usr/sbin/visudo' as the super user
  Authenticating as: ubuntu,,, (ubuntu)
  Password: 
  polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie
  ==== AUTHENTICATION FAILED ===
  Error executing command as another user: Not authorized

  解决方案

• 参考链接