1.卸载jdk

  rpm -qa|grep java

  rpm -e --nodeps 需要卸载的包

2.安装需要的rpm包

  rpm -ivh 安装包

3.解压tomcat并设置端口修改开启端口、监听端口、关闭端口

4.配置需要的内存

JAVA_OPTS='-Xms1024m -Xmx8196m'

5.配置开机启动项（centos6、7全部适用）

vi /etc/inin.d/webXXX

#!/bin/sh

# webmpos: Start/Stop/Restart webmpos

# chkconfig: 2345 60 50

# description: Tomcat is a Java Servlet Container

# match these values to your environment:

export CATALINA_BASE=/app/web/mpos

export CATALINA_HOME=/app/web/mpos

export CATALINA_TMPDIR=/app/web/mpos/temp

export JRE_HOME=/usr

# Source function library.

. /etc/init.d/functions TOMCAT=/app/web/mpos

start() {

     echo -n "Starting Tomcat:  "

     #/root/rc.local start

     /app/web/mpos/bin/startup.sh start

   }

stop() {

    echo -n "Stopping Tomcat: "

        /app/web/mpos/bin/shutdown.sh stop

   }

# See how we were called.

case "$1" in

  start)

      start

  ;;

    stop)

        stop

    ;;

 status)

    ;;

    restart)

       stop

sleep 2

       start

    ;;

 *)

echo "Usage: $0 {start stop restart}" ;;

esac

exit $RETVAL



chkconfig webXXX on

6.配置防火墙，监听端口

  centos6 

vi /etc/sysconfig/iptables

-A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT

  centos7

 firewall-cmd --zone=public --add-port=8081/tcp --permanent 

 systemctl restart firewalld