| Warning |
|---|
Add a reference to the Zero Footprint approach. |
Go to the Java website, choose the JRE or JDK based on your platform and needs. Download the requisite .bin 64-bit JRE (Java Runtime Engine). Download the .tar.gz file and upload the file to the serveradmin home folder. For older versions of Java go to the Java Archives site.
Steps for JRE and JDK are both the same. Here is an example of a JDK setup,
| Note |
|---|
Even on a 64-bit Operating System, 64-bit Java is not recommended at the moment due to significant loss in performance. |
If you try and install 32-bit Java on 64-bit Ubuntu you will get the following errorUse the account that will be launching the Java process. In this example it will be serveradmin,
| Code Block | ||
|---|---|---|
| ||
./jdk-6u22-linux-i586.bin
Unpacking...
Checksumming...
Extracting...
./jdk-6u22-linux-i586.bin: 113: ./install.sfx.7783: not found
Failed to extract the files. Please refer to the Troubleshooting section of
the Installation Instructions on the download page for more information. |
This is because the 32-bit library support is not installed,
For Ubuntu 11 and lower,
| Code Block | ||
|---|---|---|
| ||
sudo apt-get install ia32-libs # Required for 32-bit Java on 64-bit Ubuntu
|
For Ubuntu 12 and higher, ia32-lib has been removed in favour of multiarch,
| Warning |
|---|
Still to try out upon release of Ubuntu 12. |
Now 32-bit Java can be installed. To perform these actions, use the account that will be launching the Java process.
...
su - serveradmin # If you are not already serveradmin
cd ~
wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn/java/jdk/7u7-b10/jre-7u7-linux-x64.tar.gz |
The steps for JRE and JDK are both the same. Here is an example of a JRE setup,
| Code Block | ||
|---|---|---|
| ||
su - serveradmin # If you are not already serveradmin cd ~ # Switch to the serveradmin home directory chmod u+x jdk-6u22tar -xvpf jre-7u7-linux-i586x64.bin ./jdk-6u22-linux-i586.bintar.gz |
The result will be an uncompressed jdk jre directory using the same name as the package. In this example the folder name would be, jdk1.6.0_22. jre-7u7-linux-x64.
If you plan to use multiple versions of Java, we recommend keeping the folder name with the version number information and using symbolic links. If you are only using one version of Java, then simply rename the folder.
For the server example, we will rename the folder,
| Code Block |
|---|
mv jdk1.6.0_22jre-7u7-linux-x64 java |
| Tip |
|---|
You may be interested in how to Zero Footprint Java on Windows. |