Ubuntu18开机执行shell命令

sudo vi /etc/rc.local

#!/bin/bash

echo "run incar ai program..."

cd /opt/robot

nohup bash autorobot.sh & 2>/dev/null

#!/bin/bash
  
#ppp connection

errcount=0

while true
do
        if (( $errcount > 10 )); then
                echo "rebooit"
        fi

        echo "errcount is $errcount"

        airobot=$(ps aux | grep airobot | grep -v grep |wc -l)

        echo $airobot

        if [ $airobot -eq 0 ]; then
                sleep 1
                echo "no cold process"
                echo "starting"
                nohup ./airobot &
                errcount=$(( $errcount + 1 ))
        else
                echo "process exsits"
        fi

        sleep 10
done