1 JDK安装
注意：rpm与软件相关命令 相当于window下的软件助手 管理软件
步骤：
1）查看当前Linux系统是否已经安装java
输入 rpm -qa | grep java
2）卸载两个openJDK
输入rpm -e --nodeps 要卸载的软件
3）解压jdk到/usr/local下 tar –xvf jdk-7u71-linux-i586.tar.gz –C /usr/local
4）配置jdk环境变量，打开/etc/profile配置文件，将下面配置拷贝进去
#set java environment
JAVA_HOME=/usr/local/jdk1.7.0_71
CLASSPATH=.:$JAVA_HOME/lib.tools.jar
PATH=$JAVA_HOME/bin:$PATH
export JAVA_HOME CLASSPATH PATH
5）重新加载/etc/profile配置文件 source /etc/profile
2 Mysql安装
步骤：
1）查看CentOS自带的mysql
输入 rpm -qa | grep mysql
2）将自带的mysql卸载
3）上传Mysql到linux
4）解压Mysql到/usr/local/下的mysql目录(mysql目录需要手动创建)内
cd /usr/local
mkdir mysql
tar -xvf MySQL-5.6.22-1.el6.i686.rpm-bundle.tar -C /usr/local/mysql
5）在/usr/local/mysql下安装mysql
安装服务器端：rpm -ivh MySQL-server-5.6.22-1.el6.i686.rpm
安装客户端：rpm -ivh MySQL-client-5.6.22-1.el6.i686.rpm
6）启动mysql
service mysql start
7）将mysql加到系统服务中并设置开机启动
加入到系统服务：chkconfig --add mysql
自动启动：chkconfig mysql on
8）登录mysql
mysql安装好后会生成一个临时随机密码，存储位置在/root/.mysql_secret
msyql –u root -p
9）修改mysql的密码
set password = password('root');
10）开启mysql的远程登录
默认情况下mysql为安全起见，不支持远程登录mysql，所以需要设置开启
grant all privileges on *.* to 'root' @'%' identified by 'root';
flush privileges;
11）开放Linux的对外访问的端口3306
/sbin/iptables -I INPUT -p tcp --dport 3306 -j ACCEPT
/etc/rc.d/init.d/iptables save ---将修改永久保存到防火墙中
3 Tomcat安装
步骤：
1）上传Tomcat到linux上
2）解压Tomcat到/usr/local下
3）开放Linux的对外访问的端口8080
/sbin/iptables -I INPUT -p tcp --dport 8080 -j ACCEPT
/etc/rc.d/init.d/iptables save
4）启动关闭Tomcat
进入tomcat的bin下启动：./startup.sh
进入tomcat的bin下关闭：./shutdown.sh
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