- 查看云端目前支持安装的jdk版本
yum search java|grep jdk
[fangdake@Cent0S8-FTP pepCategory]$ yum search java|grep jdk
CentOS Linux 8 - AppStream 5.8 MB/s | 8.4 MB 00:01
CentOS Linux 8 - BaseOS 3.7 MB/s | 4.6 MB 00:01
CentOS Linux 8 - Extras 13 kB/s | 10 kB 00:00
java-1.8.0-openjdk.x86_64 : OpenJDK 8 Runtime Environment
java-1.8.0-openjdk-accessibility.x86_64 : OpenJDK 8 accessibility connector
java-1.8.0-openjdk-demo.x86_64 : OpenJDK 8 Demos
java-1.8.0-openjdk-devel.x86_64 : OpenJDK 8 Development Environment
java-1.8.0-openjdk-headless.x86_64 : OpenJDK 8 Headless Runtime Environment
java-1.8.0-openjdk-headless-slowdebug.x86_64 : OpenJDK 8 Runtime Environment unoptimised with full debugging on
java-1.8.0-openjdk-javadoc.noarch : OpenJDK 8 API documentation
java-1.8.0-openjdk-javadoc-zip.noarch : OpenJDK 8 API documentation compressed in a single archive
java-1.8.0-openjdk-slowdebug.x86_64 : OpenJDK 8 Runtime Environment unoptimised with full debugging on
java-1.8.0-openjdk-src.x86_64 : OpenJDK 8 Source Bundle
java-11-openjdk.x86_64 : OpenJDK 11 Runtime Environment
java-11-openjdk-demo.x86_64 : OpenJDK 11 Demos
java-11-openjdk-devel.x86_64 : OpenJDK 11 Development Environment
java-11-openjdk-headless.x86_64 : OpenJDK 11 Headless Runtime Environment
java-11-openjdk-javadoc.x86_64 : OpenJDK 11 API documentation
java-11-openjdk-javadoc-zip.x86_64 : OpenJDK 11 API documentation compressed in a single archive
java-11-openjdk-jmods.x86_64 : JMods for OpenJDK 11
java-11-openjdk-src.x86_64 : OpenJDK 11 Source Bundle
java-11-openjdk-static-libs.x86_64 : OpenJDK 11 libraries for static linking
java-17-openjdk.x86_64 : OpenJDK 17 Runtime Environment
java-17-openjdk-demo.x86_64 : OpenJDK 17 Demos
java-17-openjdk-devel.x86_64 : OpenJDK 17 Development Environment
java-17-openjdk-headless.x86_64 : OpenJDK 17 Headless Runtime Environment
java-17-openjdk-javadoc.x86_64 : OpenJDK 17 API documentation
java-17-openjdk-javadoc-zip.x86_64 : OpenJDK 17 API documentation compressed in a single archive
java-17-openjdk-jmods.x86_64 : JMods for OpenJDK 17
java-17-openjdk-src.x86_64 : OpenJDK 17 Source Bundle
java-17-openjdk-static-libs.x86_64 : OpenJDK 17 libraries for static linking
2.安装JDK
我们选择一个版本的jdk去安装，命令如下：
yum install -y java-1.8.0-openjdk.x86_64
3.验证
java -version
[fangdake@Cent0S8-FTP ~]$ java -version
openjdk version "1.8.0_312"
OpenJDK Runtime Environment (build 1.8.0_312-b07)
OpenJDK 64-Bit Server VM (build 25.312-b07, mixed mode)
4.查看JDK安装目录
安装成功之后我们看看jdk的安装目录：
find / -name 'java'
可能会提示“权限不足”，此时需要在该命令前添加sudo即可，输入密码即可。即：
sudo find / -name 'java'
备注：通过yum命令在线安装jdk简单、快捷、无需配置环境变量即可使用java相关服务。
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