Install Java offline in Ubuntu Linux and Uninstall Java

System: Ubuntu 10.04

JDK: jdk-6u20-linux-i586.bin

1. Install JDK

1. Install JDK

 
Sudo chmod U + x jdk-6u16-linux-i586.bin sudo CP-A jdk-6u20-linux-i586.bin/OPT sudo/opt/jdk-6u20-linux-i586.bin sudo Rm-F/opt/jdk-6u20-linux-i586.bin
 

2. Set JDK Environment Variables

Add sudo gedit/etc/profileCode: # Set Java environment export java_home =/opt/jdk1.6.0 _ 20 export jre_home = $ java_home/JRE export classpath = $ classpath: $ java_home/lib: $ jre_home/lib export Path = $ path: $ java_home/bin: $ jre_home/bin save and exit.
 

3. Make the environment variable take effect immediately

 
Source/etc/profile: Save the settings; otherwise, restart the instance to take effect.
 

4. Test

 
Java-version if Java version "1.6.0 _ 20" Java (TM) se Runtime Environment (build 1.6.0 _ 20-b02) Java hotspot (TM) server VM (build 16.3-b01, mixed mode) is displayed) the installation is successful.
 

Ii. Uninstall JDK

1. Delete the JDK directory

 
Sudo Rm-RF/opt/jdk1.6.0 _ 20
 

 
Sudo gedit/etc/profile deletion code: # Set Java environment export java_home =/opt/jdk1.6.0 _ 20 export jre_home = $ java_home/jreexport classpath = $ classpath: $ java_home/lib: $ jre_home/libexport Path = $ path: $ java_home/bin: $ jre_home/bin save and exit.