自动重启tomcat服务的shell脚本

#!/bin/bash
#www.jiaochengji.com
    if [ !  -f /tmp/down_count ];then
        echo "0" > /tmp/down_count
    fi
    curl -I  tomcat-host -o "/tmp/status" >/dev/null 2>&1
    code=`awk 'NR==1 {print $2}' /tmp/status`
    if [ "${code}" -ge 500 ];then
        down=`expr $(cat /tmp/down_count) + 1`
        echo "$down" > /tmp/down_count
        if [ "$down" -gt 3 ];then
            if [ ! -f "/tmp/restart_count" ];then
                echo "0" > /tmp/restart_count
            fi
            restart_count=`expr $(cat /tmp/restart_count) + 1`
            echo "$restart_count" > /tmp/restart_count
            if [ "$restart_count" -le 2 ];then
                    echo "tomcat down at `date`" >> /tmp/down_info
                    /etc/init.d/tomcat6 restart
            fi
        fi
    else
        echo "0" > /tmp/down_count
        echo "0" > /tmp/restart_count
    fi