StatC //etc/sudoers

Allow ordinary users to shutdown and reboot the machine
# sudoers file.
#
# This file MUST be edited with the 'visudo' command as root.
# Failure to use 'visudo' may result in syntax or file permission errors
# that prevent sudo from running.
#
# See the sudoers man page for the details on how to write a sudoers file.
#

# Host alias specification

# User alias specification

# Cmnd alias specification
Cmnd_Alias POWEROFF = /sbin/halt, /sbin/reboot

# Defaults specification

# Runas alias specification

# User privilege specification
root    ALL = (ALL) ALL
zhenya  ALL = NOPASSWD: POWEROFF

# Uncomment to allow people in group wheel to run all commands
# %wheel        ALL=(ALL) ALL

# Same thing without a password
# %wheel        ALL=(ALL) NOPASSWD: ALL

# Samples
# %users  ALL=/sbin/mount /cdrom,/sbin/umount /cdrom
# %users  localhost=/sbin/shutdown -h now