Home / ubuntu / Questions / 891667
Accepted
Max Koretskyi
Asked: 2017-03-11 07:21:35 +0800 CST

How come I have superuser privileges without being in sudoers file

  • 772

I've just installed Ubuntu and my user is a superuser which can execute commands with sudo. So I thought this user is added in /etc/sudoers file. But it seems it's not there:

#
# 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

# 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

The user info:

uid=1000(someuser) gid=1000(someuser) groups=1000(someuser),4(adm),24(cdrom),27(sudo),
30(dip),46(plugdev),113(lpadmin),128(sambashare)

How did I get superuser privileges?

permissions

2 Answers

  1. Best Answer

    You are in the group sudo. To quote your sudoers file (I draw your attention to the helpful comment before the effective line):

    # Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL
    • 8

  2. Your user is a member of sudo group.

    As you can see in the sudoers file all members of the group have permissions to use sudo.

    • 2