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notes/installation/Linux下JDK安装.md
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@ -2,13 +2,13 @@
>**系统环境**：centos 7.6
>
>**JDK版本**：jdk 1.8.0_20
>**JDK 版本**：jdk 1.8.0_20
### 1. 下载并解压
在[官网](https://www.oracle.com/technetwork/java/javase/downloads/index.html)下载所需版本的JDK，这里我下载的版本为[JDK 1.8](https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html) ,下载后进行解压：
在[官网](https://www.oracle.com/technetwork/java/javase/downloads/index.html) 下载所需版本的 JDK，这里我下载的版本为[JDK 1.8](https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html) ,下载后进行解压：
```shell
[root@ java]# tar -zxvf jdk-8u201-linux-x64.tar.gz
@ -31,7 +31,7 @@ export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
```
执行`source`命令，使得配置立即生效：
执行 `source` 命令，使得配置立即生效：
```shell
[root@ java]# source /etc/profile