покажи id username и cat /etc/sudoers
Вот:
id ddd
uid=500(ddd) gid=0(root) groups=0(root),81(audio),22(cdrom),80(cdwriter),71(floppy),19(proc),83(radio),112(scanner),14(uucp),113(xgrp)
а вот:
cat /etc/sudoers
# sudoers file.
#
# This file MUST be edited with the 'visudo' command as root.
#
# See the sudoers man page for the details on how to write a sudoers file.
#
# Host alias specification
# User alias specification
User_Alias WHEEL_USERS = %wheel
User_Alias XGRP_USERS = %xgrp
# Cmnd alias specification
# Defaults specification
# If env_reset is disabled, sudo will NOT reset the environment
# to only contain the fixed list of variables.
# See sudoers(5) for details.
#Defaults:WHEEL_USERS !env_reset
# Preserve DISPLAY and XAUTHORITY environment variables
# for "xgrp" group members.
Defaults:XGRP_USERS env_keep += "DISPLAY XAUTHORITY"
# User privilege specification
#root ALL=(ALL) ALL