Install jdk in ubuntu and jdk in ubuntu

Install jdk in ubuntu and jdk in ubuntu
Installation environment

Operating System: ubuntu 14.04.1 server amd64

Download jdk

wget http://download.oracle.com/otn-pub/java/jdk/7u67-b01/jdk-7u67-linux-x64.tar.gz?AuthParam=1412395049_5ee2894e196e935ec18e4b2a6236bf28

Rename

mv jdk-7u67-linux-x64.tar.gz\?AuthParam\=1412395049_5ee2894e196e935ec18e4b2a6236bf28 jdk-7u67-linux-x64.tar.gz

Extract

tar -xzf jdk-7u67-linux-x64.tar.gz

Set Environment Variables

Environment variables include user variables and system variables.

User variable configuration file :~ /. Bashrc (the hidden files in the current user's home directory can be viewed through 'LS-)

System Environment configuration file:/etc/profile

User variables are configured in the same way as system variables. This document uses user variables as an example.

Edit the configuration file. bashrc:

vi .bashrc

Append at the end of the file:

# set java environmentexport JAVA_HOME=/home/hadoop/jdk1.7.0_67export JRE_HOME=$JAVA_HOME/jreexport CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATHexport PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

Make environment variables take effect

source .bashrc

Verify

Verify that java is successfully installed.

$ java -versionjava version "1.7.0_67"Java(TM) SE Runtime Environment (build 1.7.0_67-b01)Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode)