莫名其妙的ubuntu就启动不了了，谁能提供一下12.04的/etc/sudoers文件

[NewUserFF]

ubuntu12.04，能进入登录画面，就是死活登不进去，登录的时候屏幕一闪（1秒左右），有几行代码显示出来（持续1秒，仔细看了看，没有什么错误显示，都是些最基本的登录信息，也就是说，没显示什么错误），然后就又闪回去了，登陆界面的界面选项不能用，只显示back，没有unity, unity 2D, gnome等界面信息，不能调音量，不能关机，这些选项全部空白，登录文本界面，输入sudo....这样的命令，显示/usr/bin/python Permission denied

由于关机前修改过/etc/sudoers文件，强烈怀疑是这个文件引起的，谁可以提供这个文件，这个文件不长，贴在下面就行了，我比对一下文件内容对不对，十分感谢！

[TeliuTe]

代码： 全选

teliute@1-Teacher:~$ sudo cat /etc/sudoers
[sudo] password for teliute: 
#
# 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	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
%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

[NewUserFF]

居然一样，那应该不是这里除了问题，现在普通用户一输入sudo就出问题，显示permission denied，到底哪里出问题了

[JiangHui]

文件权限丢了？

[NewUserFF]

google了一下，有个人跟我一样，他最后没解决，重装ubuntu了

[NewUserFF]

文件权限丢了？

什么意思

[NewUserFF]

我用root账号登录成功了，可以肯定的是，我的普通用户的sudo权限丢失了，有人知道怎么找回来吗

[cuihao]

你的用户还在sudo组么？

[NewUserFF]

在sudo组，这究竟是什么问题，真是莫名其妙，还能是哪里出了问题呢

[NewUserFF]

重装了一遍sudo也没用，另外说一下，如果乱输的话也会显示permission denied，而且普通用户一登录，就会显示-bash: groups: command not found

[NewUserFF]

你的用户还在sudo组么？

在sudo组

代码： 全选

id mycityofsky

代码： 全选

uid=1000(mycityofsky) gid=1000(mycityofsky) groups=1000(mycityofsky),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),109(lpadmin),124(sambashare)

[NewUserFF]

/etc/sudoer:

代码： 全选

#
# 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	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
%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

[NewUserFF]

up

[careone]

注意这行：
你的设置

代码： 全选

root   ALL=(ALL:ALL) ALL

ubuntu 10.04 的原始设置

代码： 全选

# /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

代码： 全选

root	ALL=(ALL) ALL

可能你在括号里多了四个字符：
:ALL

建议比对用 meld 等专业比对程序，不要用眼睛去比对。
细节处很容易忽略

sudo apt-get install meld

sudo meld /etc/sudoers /etc/sudoers.my

[NewUserFF]

注意这行：
你的设置

代码： 全选

root   ALL=(ALL:ALL) ALL

ubuntu 10.04 的原始设置

代码： 全选

# /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

代码： 全选

root	ALL=(ALL) ALL

可能你在括号里多了四个字符：
:ALL

建议比对用 meld 等专业比对程序，不要用眼睛去比对。
细节处很容易忽略

sudo apt-get install meld

sudo meld /etc/sudoers /etc/sudoers.my

谢谢你的回复，可能是ubuntu改过了吧，你看前面一楼一人发过ubuntu 12.04的suoder文件，的确多了一个:ALL，应该不是这个文件，不过这个比对软件好像很有用，我拿别的文件看看