I need to accomplish the following things.
Disable Ubuntu user.
Disable
sudo su
for all users.Each user should able to execute
sudo <command>
.
I have modified my sudoer file as below:
# 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"
Cmnd_Alias NSHELLS = /bin/sh,/bin/bash
Cmnd_Alias NSU = /bin/su
# 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
**%sysadmins ALL=(ALL) NOPASSWD:ALL ,!NSHELLS, !NSU**
# Allow members of group sudo to execute any command
%sudo ALL=(ALL:ALL) ALL
# See sudoers(5) for more information on "#include" directives:
Still, I can access sudo using the command:sudo sudo su
How to disable this? Any help is highly appreciated.