Step by Step Installation JAVA on CentOS or RHEL 5&6
Use these steps to Install JAVA on Redhat or CentOS 5&6
Step 1:
Download latest version of java
from http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
If you are using terminal (Command Mode)
[root@localhost ~]# cd /opt/
[root@localhost opt]# wget http://download.oracle.com/otn-pub/java/jdk/7u45-b18/jdk-7u45-linux-x64.tar.gz?AuthParam=1386151125_6d26b53924dbf30cd114f1ec8d20d78c
Extract downloaded archive using following command.
[root@localhost opt]# tar -xvzf jdk-7u25-linux- i586.tar.gz?AuthParam=1377944382_824ed437096a64593579b2d07b8e242e
[root@localhost opt]# ls -l
drwxr-xr-x 8 uucp 143 4096 Jun 6 09:53 jdk1.7.0_25
Step 2:
Install JAVA using Alternatives
After extracting java archive file, we just need to setup to use newer version of java using alternatives. Use the following commands to do it.
[root@localhost opt]# cd /opt/jdk1.7.0_25/
[root@localhost opt]# alternatives --install /usr/bin/java java /opt/jdk1.7.0_25/bin/java 2
[root@localhost opt]#alternatives --config java
There are 3 programs which provide 'java'.
Selection Command
-----------------------------------------------
1 /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
2 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
3 /opt/jdk1.7.0_25//bin/java
Enter to keep the current selection[+], or type selection number: 3
Now you have successfully configured java in your system. Go to next step to check current installed version.
Step 3:
Check Version of JAVA .
[root@localhost ~]# java -version
java version "1.7.0_25"
Java(TM) SE Runtime Environment (build 1.7.0_25-b15)
Java HotSpot(TM) Client VM (build 23.25-b01, mixed mode)
Step 4:
Setup Environment Variables
Most of java based application’s uses environment variables to work. Use following commands to setup it.
You can follow above steps to install multiple version of java as same time, but you can use only one version at a time.
Use these steps to Install JAVA on Redhat or CentOS 5&6
Step 1:
Download latest version of java
from http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
If you are using terminal (Command Mode)
[root@localhost ~]# cd /opt/
[root@localhost opt]# wget http://download.oracle.com/otn-pub/java/jdk/7u45-b18/jdk-7u45-linux-x64.tar.gz?AuthParam=1386151125_6d26b53924dbf30cd114f1ec8d20d78c
Extract downloaded archive using following command.
[root@localhost opt]# tar -xvzf jdk-7u25-linux- i586.tar.gz?AuthParam=1377944382_824ed437096a64593579b2d07b8e242e
[root@localhost opt]# ls -l
drwxr-xr-x 8 uucp 143 4096 Jun 6 09:53 jdk1.7.0_25
Step 2:
Install JAVA using Alternatives
After extracting java archive file, we just need to setup to use newer version of java using alternatives. Use the following commands to do it.
[root@localhost opt]# cd /opt/jdk1.7.0_25/
[root@localhost opt]# alternatives --install /usr/bin/java java /opt/jdk1.7.0_25/bin/java 2
[root@localhost opt]#alternatives --config java
There are 3 programs which provide 'java'.
Selection Command
-----------------------------------------------
1 /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
2 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
3 /opt/jdk1.7.0_25//bin/java
Enter to keep the current selection[+], or type selection number: 3
Now you have successfully configured java in your system. Go to next step to check current installed version.
Step 3:
Check Version of JAVA .
[root@localhost ~]# java -version
java version "1.7.0_25"
Java(TM) SE Runtime Environment (build 1.7.0_25-b15)
Java HotSpot(TM) Client VM (build 23.25-b01, mixed mode)
Step 4:
Setup Environment Variables
Most of java based application’s uses environment variables to work. Use following commands to setup it.
- Setup JAVA_HOME Variable
- Setup JRE_HOME Variable
- Setup PATH Variable
You can follow above steps to install multiple version of java as same time, but you can use only one version at a time.
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