It has been hit and miss for me every time I try to run deep freeze command on a number a lab machines that I managed. Therefore, this is what worked for me.
First all, you need to have a Remote desktop properly setup on your admin machines and on the other machines that you're tying to manage.
First step to wake up all the machines even if you can see them.
Second run this command:
Just copy and paste this command
DFXPSWD=admin-password /Library/Application\ Support/Faronics/Deep\ Freeze/deepfreeze -u adminusername -p bootThawedFor 2.
In this case Thawed twice. Change it as you see fit.
Make sure you run this as root even if your username is not root