Install jdk1.7 PRM in Linux

1. Uninstall JDK

 

The JDK is provided in Linux. If the built-in version is not used, uninstall it.

 

1. Uninstall the built-in JDK version.

 

View the built-in JDK

 

# Rpm-Qa | grep gcj

 

The following information is displayed:

 

Libgcj-4.1.2-44.el5

 

Java-1.4.2-gcj-compat-1.4.2.0-40jpp.115

 

Run the rpm-e -- nodeps command to delete the content found above:

# Rpm-e -- nodeps java-1.4.2-gcj-compat-1.4.2.0-40jpp.115

 

2. Uninstall the jkd version installed by rpm

View the installed JDK:

# Rpm-Qa | grep JDK

 

The following information is displayed:

 

Java-1.6.0-openjdk-1.6.0.0-1.7.b09.el5

 

Uninstall:

# Rpm-e -- nodeps java-1.6.0-openjdk-1.6.0.0-1.7.b09.el5

 

 

Ii. Install JDK

 

First download the installation package from the sun official website. The following is the latest installation package.

Http://java.sun.com/javase/downloads/index.jsp

If you want to find a previous version, you can find it at the address below

 

Http://java.sun.com/products/archive/

 

There are two versions of jdk-6u7-linux-i586-rpm.bin and jdk-6u7-linux-i586.bin

 

What are the differences between the two versions? What does RPM mean?

 

Bin is a binary package, while RPM is a RedHat package, which is the standard installation package of Red Hat.

The difference is that the RPM is automatically configured during installation. Generally, Lib is installed to/usr/lib bin and installed to/usr/bin. Even if it is not, you must also establish a soft connection under/usr/bin.

 

The following uses the latest version of jdk-7u3-linux-i586.rpm as an example to install:

Place the installation file in the/usr/Java directory and modify the permission. The command is as follows (you must use the CD command to switch to the corresponding directory ):

 

# Chmod + x jdk-7u3-linux-i586.rpm

 

Install the execution file:

 

# Rpm-IVH jdk-7u3-linux-i586.rpm

 

3. Configure Environment Variables

 

Modify the/etc/profile file and add

Export java_home =/usr/Java/jdk1.7.0 _ 03

Export Path = $ path:/usr/Java/jdk1.7.0 _ 03/bin

Save

Iv. Execution

CD/etc

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