How to customize service scripts and how to create standard rpm service scripts

How to customize service scripts and how to create standard rpm service scripts
Custom Service script:

#!/bin/bash#myscript#chkconfig: 2345 90 20#description:  Starts, stops and saves iptables firewallcase $1 in    start)       echo "start my script!!"       sleep 1       ;;    restart)       echo "restart my script!!"       sleep 1       ;;    stop)       echo "stop my script!!"       sleep 1       ;;    *)        echo "please input start|restart|stop"       sleep 1       ;;  esac

In this case, you cannot use chkconfig for management. You need to add the Code # chkconfig: 2345 90 20. At the 2345 level, the sequence of startup execution is 90, and the sequence of shutdown execution is 20 # description: Starts, after adding stops and saves iptables firewall, run: chkconfig myscript on chkconfig -- list myscript.

Transform the service script into a standard rpm script:
# Chkconfig: 2345 90 20
In the 2345 level, the sequence of startup and shutdown operations is 90, and the sequence of shutdown operations is 20.
# Description: Starts, stops and saves iptables firewall

Use service to enable and disable the Custom Script:
Service myscript start | stop | restart

Use chkconfig to set the custom script to boot:
Chkconfig myscript on
Chkconfig myscript off