redhat6.5 jdk卸载安装配置-2

Redhat Linux 6.5安装JDK时，可能系统中已安装了老版本的JDK，这时要先卸载老版的，之后再安装新版本。

一．卸载openJDK

[root@master ~]# java -version

java version "1.7.0_45"

OpenJDK Runtime Environment (rhel-2.4.3.3.el6-x86_64 u45-b15)

OpenJDK 64-Bit Server VM (build 24.45-b08, mixed mode)

[root@master ~]# rpm -qa | grep jdk

java-1.7.0-openjdk-1.7.0.45-2.4.3.3.el6.x86_64

java-1.6.0-openjdk-1.6.0.0-1.66.1.13.0.el6.x86_64

[root@master ~]# rpm -qa | grep gcj

[root@master ~]# java -version

java version "1.7.0_45"

OpenJDK Runtime Environment (rhel-2.4.3.3.el6-x86_64 u45-b15)

OpenJDK 64-Bit Server VM (build 24.45-b08, mixed mode)

[root@master ~]# yum -y remove java-1.7.0-openjdk-1.7.0.45-2.4.3.3.el6.x86_64 Loaded plugins: product-id, refresh-packagekit, security, subscription-manager

This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.

Setting up Remove Process

Resolving Dependencies

--> Running transaction check

---> Package java-1.7.0-openjdk.x86_64 1:1.7.0.45-2.4.3.3.el6 will be erased

--> Finished Dependency Resolution

Dependencies Resolved

====================================================================================================================

Package Arch Version Repository Size

====================================================================================================================

Removing:

java-1.7.0-openjdk x86_64 1:1.7.0.45-2.4.3.3.el6 @anaconda-RedHatEnterpriseLinux-201311111358.x86_64/6.5 90 M

Transaction Summary

====================================================================================================================

Remove 1 Package(s)

Installed size: 90 M

Downloading Packages:

Running rpm_check_debug

Running Transaction Test

Transaction Test Succeeded

Running Transaction

Erasing : 1:java-1.7.0-openjdk-1.7.0.45-2.4.3.3.el6.x86_64 1/1

Verifying : 1:java-1.7.0-openjdk-1.7.0.45-2.4.3.3.el6.x86_64 1/1

Removed:

java-1.7.0-openjdk.x86_64 1:1.7.0.45-2.4.3.3.el6

Complete!

二．安装oracle JDK

创建安装目录，在/usr/java下建立安装路径，并将文件考到该路径下：

mkdir /usr/java

[root@master usr]# cd

[root@master ~]# ls

anaconda-ks.cfg Downloads jdk-7u79-linux-x64.rpm Pictures Templates

Desktop install.log jdk-7u79-linux-x64.tar.gz Public Videos

Documents install.log.syslog Music rabbitmq-server-3.6.0-1.noarch.rpm

[root@master ~]# cp -r
jdk-7u79-linux-x64.rpm /usr/java

[root@master ~]# ls

anaconda-ks.cfg Downloads jdk-7u79-linux-x64.rpm Pictures Templates

Desktop install.log jdk-7u79-linux-x64.tar.gz Public Videos

Documents install.log.syslog Music
rabbitmq-server-3.6.0-1.noarch.rpm

[root@master ~]# cd /usr/java

[root@master java]# ls

jdk-7u79-linux-x64.rpm jdk-8u20-linux-x64.rpm

[root@master java]#

将jdk-7u79-linux-x64.rpm上传到/usr/java下。然后，要给jdk-7u79-linux-x64.rpm

分配权限，具体的这里要给它可执行的权限，输入：chmod +x jdk-7u79-linux-x64.rpm

开始执行安装命令： rpm -ivh jdk-7u79-linux-x64.rpm

Preparing... ###########################################
[100%]

1:jdk
########################################### [100%]

Unpacking JAR files...

rt.jar...

jsse.jar...

charsets.jar...

tools.jar...

localedata.jar...

jfxrt.jar...

[root@master java]#

2.设置环境变量。

#vi /etc/profile

在最后面加入 输入 i

JAVA_HOME=/usr/java/jdk1.7.0_79

PATH=$JAVA_HOME/bin:$PATH

CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export JAVA_HOME

export PATH

export CLASSPATH

保存退出：

按Esc ：wq回车即可，重启登录生效

四.验证环境变量配置成功

输入：which java 得到JAVA的执行路径，说明配置成功

/usr/java/jdk1.7.0_79/bin/java

输入：echo $JAVA_HOME

/usr/java/jdk1.7.0_79

[root@master ~]# echo $PATH

/usr/java/jdk1.7.0_79/bin:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin