6、(7)sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_71/bin/javac 300(8)sudo update-alternatives --config java(9)sudo update-alternatives --config javac(10)java –version(检查是否成功)成功则显示:java version "1.7.0_71"Java(TM) SE Runtime Environment (bu
7、ild 1.7.0_71-b14)Java HotSpot(TM) 64-Bit Server VM (build 24.71-b01, mixed mode)第三步配置ssh实现免密码登陆(1)sudovim/etc/hosts(修改DNS客户端配置实现IP-主机名映射关系)master和slaves都需要配置对应方便相互访问比如:192.168.1.1ubuntu-1192.168.1.2ubuntu-2192.168.1.3ubuntu-3192.168.1.4ubuntu-4192.168.1.5ubuntu-5192.16