Linux system installation and configuration JDK

1. Download the JDK

Download the JDK address: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

Method One:

Use the command-line download in Linux:

(Note: URL fill in the specific address of the JDK version you need to download)

wget--no-cookies--no-check-certificate--header "COOKIE:GPW_E24=HTTP%3A%2F%2FWWW.ORACLE.COM%2F; Oraclelicense=accept-securebackup-cookie "" Http://download.oracle.com/otn-pub/java/jdk/8u5-b13/jre-8u5-linux-x64.tar.gz "

Method Two:

After the Windows system has downloaded the JDK version, it is uploaded to the Linux system

Rz-eb

　　

2. Unzip the JDK

　　

3. Configuring Java Environment Variables First step: Modify the/etc/profile file

Vi/etc/profile

Append the following to the end of the file:

#set java environmentjava_home=/usr/jdk1.8.0_20classpath=.: $JAVA _home/lib.tools.jarpath= $JAVA _home/bin:$ Pathexport java_home CLASSPATH PATH

Step Two: Create a new/etc/profile.d/java.sh file (all users have permission to use this environment variable)

vi/etc/profile.d/java.sh

　　

#set java environmentjava_home=/usr/jdk1.8.0_20classpath=.: $JAVA _home/lib.tools.jarpath= $JAVA _home/bin:$ Pathexport java_home CLASSPATH PATH

　　

Step three: Make the environment variable effective

source/etc/profilesource/etc/profile.d/java.sh

4. See if the Java environment variable is configured successfully

Java-version

See the following to illustrate the success of the environment variable configuration:

[Email protected] profile.d]# java-version
Java Version "1.8.0_20"
Java (TM) SE Runtime Environment (build 1.8.0_20-b26)
Java HotSpot (TM) 64-bit Server VM (build 25.20-b23, Mixed mode)

Linux system installation and configuration JDK