安装 Java 6

1. 从服务器下载 Linux 64位 jdk 到本地。下载地址：\\192.167.100.225\share\Tool\JAVA\jdk-6u34-linux-x64.bin
2. 给安装文件添加执行权限

   • $ chmod +x jdk-6u34-linux-x64.bin

3. 安装 jdk

   • $ mkdir -p /opt/jdk6
     $ cp ./jdk-6u34-linux-x64.bin /opt/jdk6
     $ cd /opt/jdk6
     $ ./jdk-6u34-linux-x64.bin

4. 修改环境变量

   • $ sudo vim /etc/environment

   • PATH 中加入 /opt/jdk6/jdk1.6.0_34/bin，新建 JAVA_HOME 和 CLASSPATH，例：

   • PATH="/opt/jdk6/jdk1.6.0_34/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"
     JAVA_HOME=/opt/jdk6/jdk1.6.0_34
     CLASSPATH=.:/opt/jdk6/jdk1.6.0_34/lib