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How to Modify an Invalid '/etc/sudoers' File?
source link: https://happy123.me/blog/2021/01/09/how-to-modify-an-invalid-slash-etc-slash-sudoers-file/
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How to Modify an Invalid '/etc/sudoers' File?
Jan 9th, 2021 | Comments
刚说小心驶得万年船，就想自己偷奸耍滑，手工裸编辑 /etc/sudoers 文件把sudo权限搞挂了…-_-
仔细瞅了瞅，少加了一个冒号，导致现在进退两难…
解决这个问题的标准方法是pkexec，参考：
https://askubuntu.com/questions/73864/how-to-modify-an-invalid-etc-sudoers-file
但是执行pkexec的时候又暴露了一个问题:
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最后解决需要一点小技巧:
-
在第一个shell种执行:
echo $$，得到PID -
再开一个shell，再执行
pkttyagent --process PID -
再回到第一个shell执行
pkexec visudo
https://github.com/NixOS/nixpkgs/issues/18012
最后的教训是：人就是这样，要求别人头头是道，轮到自己偷奸耍滑；早用visudo还有这种事吗？
三省吾身，不说了，我得赶紧检查下自己其它耍滑头找方便留下的口子;
Posted by brain-zhang
Jan 9th, 2021tools
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