centos7 jdk 的卸载

1.查看jdk 版本

[root@jenkins ~]# java -version openjdk version "1.8.0_131" OpenJDK Runtime Environment (build 1.8.0_131-b12) OpenJDK 64-Bit Server VM (build 25.131-b12, mixed mode)

2.查看已安装的jdk 版本

[root@jenkins ~]# rpm -qa|grep java java-1.8.0-openjdk-headless-1.8.0.131-11.b12.el7.x86_64 javapackages-tools-3.4.1-11.el7.noarch tzdata-java-2017b-1.el7.noarch java-1.7.0-openjdk-headless-1.7.0.141-2.6.10.5.el7.x86_64 java-1.7.0-openjdk-1.7.0.141-2.6.10.5.el7.x86_64 java-1.8.0-openjdk-1.8.0.131-11.b12.el7.x86_64 python-javapackages-3.4.1-11.el7.noarch

3. 卸载openjdk noarch可以不用删除

[root@jenkins ~]# rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.131-11.b12.el7.x86_64 [root@jenkins ~]# rpm -e --nodeps java-1.8.0-openjdk-1.8.0.131-11.b12.el7.x86_64 [root@jenkins ~]# rpm -e --nodeps java-1.7.0-openjdk-1.7.0.141-2.6.10.5.el7.x86_64 [root@jenkins ~]# rpm -e --nodeps java-1.7.0-openjdk-1.7.0.141-2.6.10.5.el7.x86_64

4. 执行后查看结果

[root@jenkins ~]# rpm -qa|grep java javapackages-tools-3.4.1-11.el7.noarch tzdata-java-2017b-1.el7.noarch python-javapackages-3.4.1-11.el7.noarch

安装前工作准备

创建放置jdk文件夹 [root@jenkins~]# mkdir /usr/local/jdk

5.上传解压jdk包

解压在原目录需要复制或剪切到指定的安装文件夹 [root@jenkins ~]#tar -vzxf jdk-8u191-linux-x64.tar.gz
解压并剪切至目标目录 [root@jenkins 下载]# tar -vzxf jdk-8u151-linux-x64.tar.gz -C /usr/local/jdk/

6.设置环境变量 vi

[root@jenkins ~]# vi /etc/profile

7.java 环境变量配置

种配置 export JAVA_HOME=/usr/java/jdk1.8.0_211 export JRE_HOME=${JAVA_HOME}/jre export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATH export JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/bin export PATH=$PATH:${JAVA_PATH}
种配置 export JAVA_HOME=/usr/local/jdk/jdk1.8.0_151 export JRE_HOME=${JAVA_HOME}/jre export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATH export JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/bin

8.执行生效

source /etc/profile

测试生效

检测安装Java版本环境[root@jenkins ~]# java -version java version "1.8.0_151" Java(TM) SE Runtime Environment (build 1.8.0_151-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)
检测编译环境javac [root@jenkins ~]# javac -version javac 1.8.0_151

来源：oschina

链接：https://my.oschina.net/u/3518854/blog/3195322

标签

JDK

linux系统

OpenJDK

Jenkins

CenrtOS7 linux 的 jdk安装与卸载