I get the following error while trying to update my repositories,
avinash@avinash-VirtualBox:~$ sudo apt-get update
sudo: unable to stat /etc/sudoers: No such file or directory
sudo: no valid sudoers sources found, quitting
sudo: unable to initialize policy pluginIt seems like I had accidentally deleted my /etc/sudoers file./etc/sudoers file was actually belongs to sudo package, so i try to reinstall sudo by pkexec but it won't work.
avinash@avinash-VirtualBox:~$ pkexec apt-get install sudo
Reading package lists... Done
Building dependency tree
Reading state information... Done
sudo is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 301 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]? y
Setting up sudo (1.8.6p3-0ubuntu3.1) ...
WARNING: /etc/sudoers not present!
chown: cannot access ‘/etc/sudoers’: No such file or directory
dpkg: error processing sudo (--configure): subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing: sudo
E: Sub-process /usr/bin/dpkg returned an error code (1)
avinash@avinash-VirtualBox:~$ And also I had tried,
avinash@avinash-VirtualBox:~$ pkexec apt-get install --reinstall sudo
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 301 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
E: Internal Error, No file name for sudo:amd64How can i make sudo command to work again?
5 Answers
After I made a backup for /etc/sudoers file:
sudo mv /etc/sudoers{,.bak}I get the same errors like in your case.
If you use
pkexec apt-get install sudowill not work because apt-get will see that:
sudo is already the newest version.If you use:
pkexec apt-get install --reinstall sudowill also not work because /etc/sudoers file is not found to be removed and replaced.
But if you use:
pkexec apt-get purge sudo
pkexec apt-get install sudoas described in this answer, everything will work like a charm. I can say this because I just test it again.
So, there is no point to lose time and boot your system with a live disk.
3Just boot from Ubuntu live disk and copy /etc/sudoers file to the installed Ubuntu partition's /etc directory.
Boot Ubuntu live dis and click try Ubuntu option on startup.
Run
sudo blkidcommand to know the installed Ubuntu's partition id.Mount the installed Ubuntu's partition on a specific directory like below,
sudo mkdir /media/foo sudo mount /dev/sdaX /media/foo # /dev/sdaX installed Ubuntu's partition id.Now copy the live disk's
sudoersfile to the/etcdirectory of installed Ubuntu's partition.sudo cp /etc/sudoers /media/foo/etcNow boot from the hard-disk(Boot your Ubuntu OS).It will work.
Here's the raw content of /etc/sudoers on Ubuntu 13.10 :
#
# 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"
# 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.dAnd the permissions :
-r--r----- 1 root rootTo apply those, it's chmod 440 /etc/sudoers and chown root:root /etc/sudoers
execute pkexec nano /etc/sudoers
and paste
#
# 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"
# 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.dI just wanted to add this simple solution to reinstall sudo If you removed sudo with:
sudo apt-get remove sudoYou can install it again. Use:
su -Enter your root password and then:
apt-get update
apt-get install sudoexit
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