jdk-linux安装

1、jdk安装

• 将安装包复制到/soft目录下

• 解压

sudo tar -zxvf jdk-8u66-linux-x64.gz

• 删除安装包

[hadoop@localhost soft]$ sudo rm -rf jdk-8u66-linux-x64.gz

• 创建符号连接

[hadoop@localhost soft]$ sudo ln -s jdk1.8.0_66 jdk1.8

• 进入bin目录。验证是否成功

[hadoop@localhost jdk1.8]$ cd bin
[hadoop@localhost bin]$ java -version
java version "1.7.0_51"
OpenJDK Runtime Environment (rhel-2.4.5.5.el7-x86_64 u51-b31)
OpenJDK 64-Bit Server VM (build 24.51-b03, mixed mode)
[hadoop@localhost bin]$

• 添加环境变量

[hadoop@localhost bin]$ sudo nano /etc/profile
[sudo] password for hadoop:

• 使得环境变量生效

[hadoop@localhost bin]$ source /etc/profile

• 回到家目录测试环境变量是否添加成功

[hadoop@localhost bin]$ cd ~
[hadoop@localhost ~]$ java -version
java version "1.7.0_51"
OpenJDK Runtime Environment (rhel-2.4.5.5.el7-x86_64 u51-b31)
OpenJDK 64-Bit Server VM (build 24.51-b03, mixed mode)
[hadoop@localhost ~]$