read this.
if u r running a single system or a single local user
Code:
# /etc/sudoers
#
# This file MUST be edited with the 'visudo' command as root.
#
# See the man page for details on how to write a sudoers file.
#
# Host alias specification
# User alias specification
# Cmnd alias specification
# User privilege specification
root ALL=(ALL) ALL
alexy ALL=(ALL) ALL
it is better editing /etc/sudoers file using "visudo".there are many easy HW2s available in web
http://www.linuxhomenetworking.com/l...n/addusers.htm