检验JDK
未安装
[admin@bogon ~]$ java -version
bash: java: 未找到命令...
[admin@bogon ~]$ rpm -qa | grep java
[admin@bogon ~]$ 已安装
如果有默认的jdk，请使用下面命令卸载
[admin@bogon ~]$ yum -y remove java-1.8.0-openjdk-headless.x86_64安装JDK
[admin@bogon ~]$ yum list java*
上次元数据过期检查：0:15:21 前，执行于 2020年12月01日 星期二 15时56分10秒。
可安装的软件包
java-1.8.0-openjdk.x86_64 1:1.8.0.272.b10-1.el8_2 AppStream
java-1.8.0-openjdk-accessibility.x86_641:1.8.0.272.b10-1.el8_2 AppStream
java-1.8.0-openjdk-demo.x86_64 1:1.8.0.272.b10-1.el8_2 AppStream
java-1.8.0-openjdk-devel.x86_64 1:1.8.0.272.b10-1.el8_2 AppStream
java-1.8.0-openjdk-headless.x86_64 1:1.8.0.272.b10-1.el8_2 AppStream
java-1.8.0-openjdk-javadoc.noarch 1:1.8.0.272.b10-1.el8_2 AppStream
java-1.8.0-openjdk-javadoc-zip.noarch1:1.8.0.272.b10-1.el8_2 AppStream
java-1.8.0-openjdk-src.x86_64 1:1.8.0.272.b10-1.el8_2 AppStream
java-11-openjdk.x86_64 1:11.0.9.11-0.el8_2 AppStream
java-11-openjdk-demo.x86_64 1:11.0.9.11-0.el8_2 AppStream
java-11-openjdk-devel.x86_64 1:11.0.9.11-0.el8_2 AppStream
java-11-openjdk-headless.x86_64 1:11.0.9.11-0.el8_2 AppStream
java-11-openjdk-javadoc.x86_64 1:11.0.9.11-0.el8_2 AppStream
java-11-openjdk-javadoc-zip.x86_64 1:11.0.9.11-0.el8_2 AppStream
java-11-openjdk-jmods.x86_64 1:11.0.9.11-0.el8_2 AppStream
java-11-openjdk-src.x86_64 1:11.0.9.11-0.el8_2 AppStream
java-atk-wrapper.x86_64 0.33.2-6.el8 AppStream
javapackages-filesystem.noarch 5.3.0-1.module_el8.0.0+11+5b8c10bd AppStream
javapackages-tools.noarch 5.3.0-1.module_el8.0.0+11+5b8c10bd AppStream
[admin@bogon ~]$ sudo yum install java-11-openjdk* -y
[sudo] admin 的密码：
Repository AppStream is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository PowerTools is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
上次元数据过期检查：0:28:21 前，执行于 2020年12月01日 星期二 16时30分05秒。
依赖关系解决。
================================================================================软件包 架构 版本 仓库 大小
================================================================================
安装:java-11-openjdk x86_64 1:11.0.9.11-0.el8_2 AppStream 251 kjava-11-openjdk-demo x86_64 1:11.0.9.11-0.el8_2 AppStream 4.3 Mjava-11-openjdk-devel x86_64 1:11.0.9.11-0.el8_2 AppStream 3.4 Mjava-11-openjdk-headless x86_64 1:11.0.9.11-0.el8_2 AppStream 40 Mjava-11-openjdk-javadoc x86_64 1:11.0.9.11-0.el8_2 AppStream 16 Mjava-11-openjdk-javadoc-zip x86_64 1:11.0.9.11-0.el8_2 AppStream 42 Mjava-11-openjdk-jmods x86_64 1:11.0.9.11-0.el8_2 AppStream 323 Mjava-11-openjdk-src x86_64 1:11.0.9.11-0.el8_2 AppStream 50 M
安装依赖关系:copy-jdk-configs noarch 3.7-1.el8 AppStream 27 kjavapackages-filesystem noarch 5.3.0-1.module_el8.0.0+11+5b8c10bdAppStream 30 klksctp-tools x86_64 1.0.18-3.el8 base 100 kttmkfdir x86_64 3.0.9-54.el8 AppStream 62 ktzdata-java noarch 2020d-1.el8 AppStream 190 kxorg-x11-fonts-Type1 noarch 7.5-19.el8 AppStream 522 k
启用模块流:javapackages-runtime 201801 事务概要
================================================================================
安装 14 软件包总下载：480 M
安装大小：884 M
下载软件包：
(1/14): copy-jdk-configs-3.7-1.el8.noarch.rpm 29 kB/s | 27 kB 00:00
(2/14): java-11-openjdk-11.0.9.11-0.el8_2.x86_6 74 kB/s | 251 kB 00:03
(3/14): java-11-openjdk-demo-11.0.9.11-0.el8_2. 441 kB/s | 4.3 MB 00:10
(4/14): java-11-openjdk-devel-11.0.9.11-0.el8_2 258 kB/s | 3.4 MB 00:13
(5/14): java-11-openjdk-javadoc-11.0.9.11-0.el8 263 kB/s | 16 MB 01:02
(6/14): java-11-openjdk-headless-11.0.9.11-0.el 366 kB/s | 40 MB 01:51
(7/14): java-11-openjdk-javadoc-zip-11.0.9.11-0 322 kB/s | 42 MB 02:14
(8/14): javapackages-filesystem-5.3.0-1.module_ 100 kB/s | 30 kB 00:00
(9/14): ttmkfdir-3.0.9-54.el8.x86_64.rpm 203 kB/s | 62 kB 00:00
(10/14): tzdata-java-2020d-1.el8.noarch.rpm 315 kB/s | 190 kB 00:00
(11/14): xorg-x11-fonts-Type1-7.5-19.el8.noarch 249 kB/s | 522 kB 00:02
(12/14): lksctp-tools-1.0.18-3.el8.x86_64.rpm 567 kB/s | 100 kB 00:00
(13/14): java-11-openjdk-src-11.0.9.11-0.el8_2. 301 kB/s | 50 MB 02:51
(14/14): java-11-openjdk-jmods-11.0.9.11-0.el8_ 198 kB/s | 323 MB 27:48
--------------------------------------------------------------------------------
总计 282 kB/s | 480 MB 29:01
运行事务检查
事务检查成功。
运行事务测试
事务测试成功。
运行事务运行脚本: copy-jdk-configs-3.7-1.el8.noarch 1/1 运行脚本: java-11-openjdk-headless-1:11.0.9.11-0.el8_2.x86_64 1/1 准备中 : 1/1 安装 : javapackages-filesystem-5.3.0-1.module_el8.0.0+11+5b8c10bd. 1/14 安装 : lksctp-tools-1.0.18-3.el8.x86_64 2/14 运行脚本: lksctp-tools-1.0.18-3.el8.x86_64 2/14 安装 : tzdata-java-2020d-1.el8.noarch 3/14 安装 : ttmkfdir-3.0.9-54.el8.x86_64 4/14 安装 : xorg-x11-fonts-Type1-7.5-19.el8.noarch 5/14 运行脚本: xorg-x11-fonts-Type1-7.5-19.el8.noarch 5/14 安装 : copy-jdk-configs-3.7-1.el8.noarch 6/14 安装 : java-11-openjdk-headless-1:11.0.9.11-0.el8_2.x86_64 7/14 运行脚本: java-11-openjdk-headless-1:11.0.9.11-0.el8_2.x86_64 7/14 安装 : java-11-openjdk-1:11.0.9.11-0.el8_2.x86_64 8/14 运行脚本: java-11-openjdk-1:11.0.9.11-0.el8_2.x86_64 8/14 安装 : java-11-openjdk-devel-1:11.0.9.11-0.el8_2.x86_64 9/14 运行脚本: java-11-openjdk-devel-1:11.0.9.11-0.el8_2.x86_64 9/14 安装 : java-11-openjdk-jmods-1:11.0.9.11-0.el8_2.x86_64 10/14 安装 : java-11-openjdk-demo-1:11.0.9.11-0.el8_2.x86_64 11/14 安装 : java-11-openjdk-javadoc-1:11.0.9.11-0.el8_2.x86_64 12/14 运行脚本: java-11-openjdk-javadoc-1:11.0.9.11-0.el8_2.x86_64 12/14 安装 : java-11-openjdk-javadoc-zip-1:11.0.9.11-0.el8_2.x86_64 13/14 运行脚本: java-11-openjdk-javadoc-zip-1:11.0.9.11-0.el8_2.x86_64 13/14 安装 : java-11-openjdk-src-1:11.0.9.11-0.el8_2.x86_64 14/14 运行脚本: copy-jdk-configs-3.7-1.el8.noarch 14/14 运行脚本: java-11-openjdk-1:11.0.9.11-0.el8_2.x86_64 14/14 运行脚本: java-11-openjdk-devel-1:11.0.9.11-0.el8_2.x86_64 14/14 运行脚本: java-11-openjdk-src-1:11.0.9.11-0.el8_2.x86_64 14/14 验证 : copy-jdk-configs-3.7-1.el8.noarch 1/14 验证 : java-11-openjdk-1:11.0.9.11-0.el8_2.x86_64 2/14 验证 : java-11-openjdk-demo-1:11.0.9.11-0.el8_2.x86_64 3/14 验证 : java-11-openjdk-devel-1:11.0.9.11-0.el8_2.x86_64 4/14 验证 : java-11-openjdk-headless-1:11.0.9.11-0.el8_2.x86_64 5/14 验证 : java-11-openjdk-javadoc-1:11.0.9.11-0.el8_2.x86_64 6/14 验证 : java-11-openjdk-javadoc-zip-1:11.0.9.11-0.el8_2.x86_64 7/14 验证 : java-11-openjdk-jmods-1:11.0.9.11-0.el8_2.x86_64 8/14 验证 : java-11-openjdk-src-1:11.0.9.11-0.el8_2.x86_64 9/14 验证 : javapackages-filesystem-5.3.0-1.module_el8.0.0+11+5b8c10bd. 10/14 验证 : ttmkfdir-3.0.9-54.el8.x86_64 11/14 验证 : tzdata-java-2020d-1.el8.noarch 12/14 验证 : xorg-x11-fonts-Type1-7.5-19.el8.noarch 13/14 验证 : lksctp-tools-1.0.18-3.el8.x86_64 14/14
Installed products updated.已安装:copy-jdk-configs-3.7-1.el8.noarch java-11-openjdk-1:11.0.9.11-0.el8_2.x86_64 java-11-openjdk-demo-1:11.0.9.11-0.el8_2.x86_64 java-11-openjdk-devel-1:11.0.9.11-0.el8_2.x86_64 java-11-openjdk-headless-1:11.0.9.11-0.el8_2.x86_64 java-11-openjdk-javadoc-1:11.0.9.11-0.el8_2.x86_64 java-11-openjdk-javadoc-zip-1:11.0.9.11-0.el8_2.x86_64 java-11-openjdk-jmods-1:11.0.9.11-0.el8_2.x86_64 java-11-openjdk-src-1:11.0.9.11-0.el8_2.x86_64 javapackages-filesystem-5.3.0-1.module_el8.0.0+11+5b8c10bd.noarch lksctp-tools-1.0.18-3.el8.x86_64 ttmkfdir-3.0.9-54.el8.x86_64 tzdata-java-2020d-1.el8.noarch xorg-x11-fonts-Type1-7.5-19.el8.noarch 完毕！
[admin@bogon ~]$ java -version
openjdk version "11.0.9" 2020-10-20 LTS
OpenJDK Runtime Environment 18.9 (build 11.0.9+11-LTS)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.9+11-LTS, mixed mode, sharing)
[admin@bogon ~]$
总结
查看列表
yum list java*
安装jdk11
若权限不够则需要增加"sudo"
yum install java-11-openjdk* -y
查看JDK版本
java -version