Linux下sudo命令无法使用及报sudoers.d下某文件语法错误

在这种情况下 我们是往往进入不到root模式下的

问题来源：添加用户的时候重复添加等导致。

sudoers文件错误

1. pkexec visudo命令打开sudoers文件

2. 修改该文件(此处展示一份无错配置)

   #
   # This file MUST be edited with the 'visudo' command as root.
   #
   # Please consider adding local content in /etc/sudoers.d/ instead of
   # directly modifying this file.
   #
   # See the man page for details on how to write a sudoers file.
   #
   Defaults	env_reset
   Defaults	mail_badpass
   Defaults	secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"
   
   # Host alias specification
   
   # User alias specification
   
   # Cmnd alias specification
   
   # User privilege specification
   root	ALL=(ALL:ALL) ALL
   stack   ALL=(ALL) NOPASSWD: ALL
   #dengschoo  ALL=(ALL:ALL) ALL
   # Members of the admin group may gain root privileges
   %admin ALL=(ALL) ALL
   
   # Allow members of group sudo to execute any command
   %sudo	ALL=(ALL:ALL) ALL
   
   # See sudoers(5) for more information on "#include" directives:
   #includedir /etc/sudoers.d
   

3. ESC: Ctrl + X保存退出(可能要按两次 多看提示)

4. 再尝试sudo命令等 检查是否还有其它问题

sudoers.d目录下某个文件报错

这种情况下sudoers文件是没有问题的 就需要先把sudoers.d目录从sudoers文件中移除

#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults	env_reset
Defaults	mail_badpass
Defaults	secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"

# Host alias specification

# User alias specification

# Cmnd alias specification

# User privilege specification
root	ALL=(ALL:ALL) ALL
stack   ALL=(ALL) NOPASSWD: ALL
#dengschoo  ALL=(ALL:ALL) ALL
# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL

# Allow members of group sudo to execute any command
%sudo	ALL=(ALL:ALL) ALL

# See sudoers(5) for more information on "#include" directives:


#就是这句 包含了该目录下的其他用户的权限 把它注释
#includedir /etc/sudoers.d

#includedir /etc/sudoers.d => ##includedir /etc/sudoers.d

然后就可以正常使用sudo命令了 就可以切换到root用户 然后删除或者修改出问题的文件了。

修改完成后别忘记重新 把刚才的注释改回来 为了不影响以后其它操作。

完全删除用户

userdel -r username

find / -name "*haha*"查看是否还有与该用户相关的文件