Whenever I issue command sudo apt-get install foo
it does not ask for password.
is it because of user groups?
How to make it prompt for password?
Edit: My sudoers file
apple@Ascension:~$ sudo cat /etc/sudoers
#
# 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
ALL ALL=(ALL) NOPASSWD:ALL
ALL ALL=(ALL) NOPASSWD:ALL
ALL ALL=(ALL) NOPASSWD:ALL