Linux System Java Environment configuration

1. Uninstall the JDK that comes with the Linux system

Java-version

Rpm-qa | Grep-i Java

We're going to delete our own JDK environment.

RPM-E--nodeps java-1.6.0-openjdk-1.6.0.0-1.66.1.13.0.el6.i686

RPM-E--nodeps java-1.7.0-openjdk-1.7.0.45-2.4.3.3.el6.i686

Query again whether it has been deleted

2. Install the JDK you downloaded

2.1 Download JDK, Address: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

Using a 32-bit Linux system, so download 32-bit, you can use the command query is 32-bit or 64-bit

Getconf Long_bit

2.2 Upload the JDK to the server and unzip it to the directory you created.

Mkdir-p/usr/local/java

Unzip the JDK below/usr/local/java

TAR-ZXVF jdk-8u171-linux-i586.tar.gz-c/usr/local/java/

cd/usr/local/java/jdk1.8.0_171/

3. Configure Environment variables

3.1 Editing the Linux environment variable file

Vim/etc/profile

Press I to insert

3.2 Adding a Java Variable environment

#java configjava_home=/usr/local/java/jdk1.8.0_171classpath=.: $JAVA _home/lib/tools.jarpath= $JAVA _home/bin:$ Pathexport java_home CLASSPATH PATH

Press ESC to exit edit mode, enter: Wq save

3.3 Save the variable file, reload the variable

The input Java command will prompt

Reload environment variable configuration file

Source/etc/profile

4. Test whether the installation is successful

Executive Java,javac

Java Configuration Complete

Linux System Java Environment configuration