Linux Installation configuration Java Environment Tutorial

Objective:

This tutorial is based on JDK 1.8, but this tutorial is for versions such as jdk1.7.

Tutorial Body: 1.1. Login to Oracle website Download jdk1.8 installation package (GZ end)

Here you can use "wget +" to implement the download.

　　Q: do I need a cookie to download the JDK?

A : students are advised to click the download directly in the browser and then copy the download link in the download task. ）

1.2. Extract the installation package to the specified directory (e.g./usr/local/soft/)

Tar  -XZVF  JDK installation package

1.3. Configure the environment variables.

( add the path to the JDK and JRE in/etc/profile and add to path)

1.3.1. Open File/etc/profile:

Vim/etc/profile

1.3.2. Add the following:

( please fill in your actual JDK path, the following example of the JDK path is the/USR/LOCAL/SOFT/JDK folder name )

Export JAVA_HOME=/USR/LOCAL/SOFT/JDK folder name Export JRE_HOME=/USR/LOCAL/SOFT/JDK folder name/jreexport path= $PATH: $JAVA _home/ Bin: $JRE _home/bin

1.3.3. Press ESC, enter: Wq Save to exit.

1.4. Adding Java to the bin

( please fill in your actual JDK path, the following example of the JDK path is the/USR/LOCAL/SOFT/JDK folder name )

Update-alternatives--install/usr/bin/java java/usr/lcoal/soft/jdk folder name 300

1.5. Add Javac to Bin

( please fill in your actual javac path, the following example of the JDK path is the/USR/LOCAL/SOFT/JDK folder name/bin/javac)

Update-alternatives--install/usr/bin/javac javac/usr/lcoal/soft/jdk folder name/bin/javac 300

This blog address:http://www.cnblogs.com/toulanboy/ 1.6. Select the JDK version

( recommended, as it is possible to store multiple JDK versions on the current machine )

1.6.1. Enter the following command

Update-alternatives--config Java

1.6.2. Enter a number to select the version we are installing.

1.7. Refresh the system environment variables

Source/etc/profile

1.8. Verification

(normal output is correct)

Java-versionjavajavac

This blog address:http://www.cnblogs.com/toulanboy/ Reference: "Kafka Introduction and Practice"

Linux Installation configuration Java Environment Tutorial