Shutdown Windows from Samba
From Maze's wiki
#!/bin/bash
wks=(`nmap -sL --dns-servers 10.x.x.x,10.x.x.x 10.x.x.x/22, 10.x.x.x.x/23 grep FQDN|cut -d" " -f2 |grep -v -f serverlist`)
for (( i=0; i < "${#wks[@]}"; i++)); do
net rpc SHUTDOWN -C "This system was left on after hours and is being shutdown" -f -I "${wks[$i]}" -U user_name%password
done
