I have a raspi type device in a data center, and recently accidentally fat fingered and pasted a shutdown command into the wrong terminal on my screen. Is there a way to keep `shutdown -r` but remove `#poweroff` `#shutdown -P -H` options? 

I want to keep `shutdown -r` command. I like to put a timer on it if I manage to freeze the system, or lock myself out with ip table rules. example `shutdown -r +10`