Installation Notes
J2SE Runtime Environment 5.0
Linux (32-bit)
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Contents
System Requirements
J2SE Runtime Environment Installation Instructions
Installation of Self-Extracting Binary
Installation of RPM File
Java Plug-in Browser Registration Instructions
Java Web Start Installation Notes
J2SE Runtime Environment 5.0 (JRE) is supported on i586 Intel and 100% compatible
platforms running Linux.
For supported versions of Linux and desktop managers, along
with disk and RAM requirements, see
System Configurations.
For issues, see the Troubleshooting
section of the JDK installation notes and the
Linux Notes
section of the Release Notes. Also available is
Known Problems on Non-Supported Platforms of the JDK installation notes.
Installing the J2SE Runtime Environment automatically installs the Java Plug-in and
Java Web Start. Note that the Java Plug-in needs to be
registered with the browser. After installing the JRE, refer to:
Install formats - J2SE Runtime Environment 5.0 is available in two installation formats.
- Self-extracting Binary File - This file can be used to install the
J2SE Runtime Environment in a location chosen by the user. This one can be
installed by anyone (not only root users), and it can easily be installed
in any location. As long as you are not root user, it cannot displace
the system version of the Java platform suppled by Linux.
To use this file, see
Installation of Self-Extracting Binary below.
- RPM Packages - A rpm.bin file containing RPM packages,
installed with the rpm utility. Requires root access
to install, and installs by default in a location that replaces
the system version of the Java platform supplied by Linux.
To use this bundle, see
Installation of RPM File below.
Choose the install format that is most suitable to your needs.
Note: For any text on this page containing the following notation,
you must substitute the appropriate J2SE Runtime Environment update version number
for the notation.
<version>
For example, if you are downloading update 1.5.0_01, the following command:
./jre-1_5_0_<version>-linux-i586.bin
would become:
./jre-1_5_0_01-linux-i586.bin
Installation of Self-Extracting Binary
Use these instructions if you want to use the self-extracting
binary file to install the J2SE Runtime Environment. If you want to install
RPM packages instead, see
Installation of RPM File.
1.
Download and check the download file size
to ensure that you have downloaded the full,
uncorrupted software bundle.
You can download to any directory you choose; it does not have
to be the directory where you want to install the J2SE Runtime Environment.
Before you download the file, notice its byte size provided
on the download page on the web site.
Once the download has completed, compare that file size
to the size of the downloaded file to make sure they are equal.
2.
Make sure that execute permissions are set on
the self-extracting binary.
Run this command:
chmod +x jre-1_5_0_<version>-linux-i586.bin
3.
Change directory to the location where you would
like the files to be installed.
The next step installs the J2SE Runtime Environment into the current directory.
4.
Run the self-extracting binary.
Execute the downloaded file, prepended by the path to it.
For example, if the file is in the current directory, prepend
it with "./" (necessary if "." is not in the
PATH environment variable):
./jre-1_5_0_<version>-linux-i586.bin
The binary code license is displayed, and you are prompted
to agree to its terms.
The J2SE Runtime Environment files are installed in a directory called
jre1.5.0_<version> in the current
directory. Follow this link to see its
directory structure.
Note about Root Access:
Unbundling the software automatically creates a
directory called jre1.5.0_<version>.
Note that if you choose to install
the J2SE Runtime Environment into system-wide location such as /usr/local,
you must first become root to gain the necessary permissions. If you do
not have root access, simply install the J2SE Runtime Environment into your home
directory, or a subdirectory that you have permission to write to.
Note about Overwriting Files:
If you unpack the software in a directory that contains a subdirectory
named jre1.5.0_<version>,
the new software overwrites files of the same name in that
jre1.5.0_<version> directory. Please be careful
to rename the old directory if it contains files you would like to keep.
Note about System Preferences:
By default, the installation script
configures the system such that the backing store for system preferences
is created inside the J2SE Runtime Environment's installation directory. If the
JRE is installed on a network-mounted drive, it and the system preferences
can be exported for sharing with Java runtime environments on other
machines. As an alternative, root users can use the
-localinstall option when running the installation script, as in
this example:
jre-1_5_0_<version>-linux-i586.bin -localinstall
This option causes the system preferences to be stored in the
/etc directory from which they can be shared only by VMs
running on the local machine. You must be root user for the
-localinstall option to work.
See the Preferences API documentation for more information
about preferences in the Java platform.
Installation of RPM File
Use these instructions if you want to install J2SE Runtime Environment in the
form of RPM packages. If you want to use
the self-extracting binary file instead, see
Installation of Self-Extracting Binary.
1.
Download and check the file size.
You can download to any directory you choose.
Before you download the file, notice its byte size provided
on the download page on the web site.
Once the download has completed, compare that file size
to the size of the downloaded file to make sure they are equal.
2.
Become root by running the su command
and entering the super-user password.
3.
Extract and install the contents of the downloaded file.
Change directory to where the downloaded file is located and
run these commands to first set the executable permissions and
then run the binary to extract and run the RPM file:
chmod a+x jre-1_5_0_<version>-linux-i586-rpm.bin
./jre-1_5_0_<version>-linux-i586-rpm.bin
Note that the initial "./" is required if you do not have "."
in your PATH environment variable.
The script displays a binary license agreement, which you
are asked to agree to before installation can proceed. Once
you have agreed to the license, the install script creates
and runs the file jre-1_5_0_<version>-linux-i586.rpm
in the current directory.
NOTE - If instead you want to only extract the RPM file but not install it,
you can run the .bin file with the -x argument. You do not need
to be root to do this.
4.
Delete the bin and rpm file
if you want to save disk space.
5.
Exit the root shell.
Java Plug-in Browser Registration Instructions
See Java Plug-in Browser Registration Instructions
in the Installation Notes for JDK for Linux.
Java Web Start Installation Notes
This J2SE Runtime Environment release includes Java Web Start; it is installed automatically with
the J2SE Runtime Environment. But note the following:
- Compatibility: The release of Java Web Start that comes with this
JDK/JRE can be run on SDK/JRE 1.2.2 or later. It will not work with SDK/JRE
1.1.x or earlier.
- Upgrading from Previous Versions: If you have a previous release
of Java Web Start, do not uninstall it. Uninstalling it will cause the download
cache to be cleared, and all previously installed Java Web Start applications
will have to be downloaded again. This new release will overwrite previous
installations and automatically update browsers to use this new release. The
configuration files and program files folder used by Java Web Start have not
changed, so all your settings will remain intact after the upgrade.
- Using Java Web Start with Netscape 6.x/7.x: For Netscape 6.x/7.x
users, setup the Java Web Start MIME type (JNLP) in the Edit->Preferences->Navigator->Helper
Applications section. The file extension is
jnlp; MIME Type is
application/x-java-jnlp-file. It should be handled by the javaws
executable file in your Java Web Start directory. Also note that, due to a
problem with the JavaScript in Netscape 6.x/7.x, you must use the non-JavaScript
version of the demos page
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