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I accidentally removed my user from some groups yesterday because of some virtualbox issues and today I couldn't use sudo to do anything and had to use a livecd to edit sudoers.

Anyway I want to edit the user to be in the same groups it would be in the default installation but I don't which groups to add the user to.

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2 Answers

up vote 5 down vote accepted

Apart from your user's group, you are in

adm dialout cdrom plugdev lpadmin admin sambashare

/etc/sudoers should look like this:

#
# 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

# 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

#includedir /etc/sudoers.d
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Here's what I'm a member of and I haven't changed anything since install:

wojox@wojox-desktop:~$ groups
wojox adm dialout cdrom plugdev lpadmin admin sambashare

Just change wojox for your user name.

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