Shutting down computer when no one is on servers-CodePudding

I run multiple minecraft servers on my tower and am trying to figure out a script to run in the background that will check if no one has been on any of the servers for the past 30 minutes and then shut down the servers and computer. Then I will use my raspberry pi for wake on lan when someone wants to join.

I figured out how to shut down the servers using rcon and the wake on lan stuff. The main problem I have is figuring out the shutdown. The only thing I've been able to find is how to check if someone is on that specific IP using

lsof -iTCP:25565 -sTCP:ESTABLISHED

But I don't know where to go from there. I am using a Linux machine and most of my experience with bash files comes from setting up the servers and that's about it. Any help you could give would be greatly appreciated! Thanks!

CodePudding user response：

something like this then:

#!/bin/bash

PORTLIST="25565 25566 25567"
TIMEOUT=3600

let T=0
declare -i START
declare -i NOW
START=$(date  %s)

while [ $T -lt $TIMEOUT ] ; do
   sleep 30
   for PORT in $PORTLIST ; do
      if lsof -iTCP:$PORT -sTCP:ESTABLISHED >/dev/null ; then
         T=0
         START=$(date  %s)
         # starting over
         continue 2
         fi
      done
   NOW=$(date  %s)
   let T=NOW-START
   done
echo timeout

PORTLIST and TIMEOUT being the only variables to change