#!/bin/bash PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH Install_nginx() { echo "Install_safelogin" } Uninstall_nginx() { echo "Uninstall_safelogin" } action=$1 host=$2; if [ "${1}" == 'install' ];then Install_nginx else Uninstall_nginx fi