redhat6.5 JDK Uninstall installation configuration

Redhat Linux 6.5 When you install the JDK , you may have an older version of the JDK installed in your system , then uninstall the old version beforeinstalling the new version.

A. Uninstalling OpenJDK

[Email protected] ~]# 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)

[Email protected] ~]# 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

[Email protected] ~]# Rpm-qa | grep GCJ

[Email protected] ~]# 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)

[Email protected] ~]# 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 isn't registered to Red Hat Subscription Management. You can use the 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 'll 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 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!

Two Installing Oracle JDK

Create the installation directory, set up the installation path under/usr/java, and test the file under this path:
Mkdir/usr/java

[[Email protected] usr]# CD

[[email protected] ~]# 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

[Email protected] ~]# Cp-rjdk-7u79-linux-x64.rpm/usr/java

[[email protected] ~]# 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

[Email protected] ~]# Cd/usr/java

[[email protected] java]# ls

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

[Email protected] java]#

Upload the jdk-7u79-linux-x64.rpm to/usr/java. And then, to give jdk-7u79-linux-x64.rpm

Assign permissions, specifically to give it permission to execute, enter: chmod +x jdk-7u79-linux-x64.rpm

Start the Install command: 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 ...

[Email protected] java]#

2. Set environment variables.

#vi/etc/profile

Add input I to the last face

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

Save exit:

Press ESC:WQ to enter, restart login effective

Four. Verify that the environment variable is configured successfully

Input: Which Java gets the Java execution path, indicating that the configuration was successful

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

Input: Echo $JAVA _home

/usr/java/jdk1.7.0_79

[Email protected] ~]# 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

redhat6.5 JDK Uninstall installation configuration