安装nmap：
yum install nmap -y
nmap 127.0.0.1
脚本
vim apache_is_start.sh
chmod 755 apache_is_start.sh
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#!/bin/bash# 判断apache是否启动# Author:James 2016-10-14# apache所在机器的IP(默认apache端口为80)ipport=127.0.0.1# 获取apache是否启动状态(通过-w全量匹配tcp的80端口)isopen=$(nmap $ipport| grep -w 80/tcp | grep http | awk '{print $2}')if [ "$isopen" == "open" ] then echo "$(date) httpd is ok!" >> /tmp/apache.log else # 启动apache /etc/rc.d/init.d/httpd start &>/dev/null echo "$(date) restart httpd!" >> /tmp/apache-err.logfi |