Debian/sudo

#aptitude install sudo
#visudo

 # User alias specification
 User_Alias ADMIN=user_name
 
 # Cmnd alias specification
 Cmnd_Alias HALT=/sbin/reboot,/sbin/halt
 Cmnd_Alias MODULE=/sbin/rmmod,/sbin/modprobe
 Cmnd_Alias APT=/usr/bin/aptitude,/usr/bin/dpkg
 
 # User privilege specification
 root    ALL=(ALL) ALL
 ADMIN ALL=NOPASSWD: HALT
 ADMIN ALL=NOPASSWD: MODULE
 ADMIN ALL=NOPASSWD: APT