This page describes JDK for Linux system requirements and gives installation instructions for several JDK-Linux combinations.
This page contains these topics:
See "JDK 8 and JRE 8 Installation Start Here" for general information about installing JDK 8 and JRE 8.
For information on enhancements to JDK 8 that relate to the installer, see "Installer Enhancements in JDK 8".
See http://www.oracle.com/technetwork/java/javase/certconfig-2095354.html for information about supported platforms, operating systems, and browsers.
On a 64-bit system, you can download either the 64-bit or the 32-bit version of the Java platform. However, if you are using a 32-bit browser and you want to use the plugin, then you need to install the 32-bit version of the Java platform. To determine which version of Firefox you are running, launch the application, and select the menu item Help -> About Mozilla Firefox. At the bottom of the window is a version string line that contains either "Linux i686" (32-bit) or "Linux x86_64" (64-bit). To setup the Java plugin, see "Manual Installation and Registration of Java Plugin for Linux".
This topic describes:
"Installation of the 64-bit JDK on RPM-based Linux Platforms"
"Installation of the 32-bit JDK on RPM-based Linux Platforms"
For instructions containing the notation version, substitute the appropriate JDK update version number. For example, if you are installing update JDK 8 update release 2, the following string representing the name of the bundle:
jdk-8uversion-linux-i586.tar.gz
becomes:
jdk-8u2-linux-i586.tar.gz
Note that, as in the preceding example, the version number is sometimes preceded with the letter u, for example, 8u2, and sometimes it is preceded with an underbar, for example, jdk1.8.0_02.
The following table lists the options and instructions for downloading the JDK 8 release on a Linux platform.
| Download File and Instructions | Architecture (CPU Type) | Who Can Install |
|---|---|---|
For Linux x64 systems: jdk-8uversion-linux-x64.tar.gz"Installation of the 64-bit JDK on Linux Platforms" |
Intel - 64-bit | anyone |
For Linux aarch64 (64-bit ARM) systems: jdk-8uversion-linux-aarch64.tar.gz (version 8u271 and later)"Installation of the 64-bit JDK on Linux Platforms |
ARM - 64-bit | anyone |
For Linux x86 systems: jdk-8uversion-linux-i586.tar.gz"Installation of the 32-bit JDK on Linux Platforms" |
Intel - 32-bit | anyone |
For Linux x64 systems: jdk-8uversion-linux-x64.rpm"Installation of the 64-bit JDK on RPM-based Linux Platforms" |
Intel - 64-bit RPM-based Linux | root |
For Linux aarch64 (64-bit ARM) systems: jdk-8uversion-linux-aarch64.rpm (version 8u271 and later)"Installation of the 64-bit JDK on RPM-based Linux Platforms" |
ARM - 64-bit RPM-based Linux | root |
For Linux x86 systems: jdk-8uversion-linux-i586.rpm"Installation of the 32-bit JDK on RPM-based Linux Platforms" |
Intel - 32-bit RPM-based Linux | root |
Installation can be performed using either of the following:
Installation of JDK using archive files (.tar.gz) allows you to install a private version of the JDK for the current user into any location, without affecting other JDK installations. However, it may involve manual steps to get some of the features to work (for example, the -version:release option of the java command, which allows you to specify the release to be used to run the specified class, requires the correct path to the JDK release under /usr/jdk).
Installation of JDK using RPM packages allows you to perform a system-wide installation of the JDK for all users, and requires root access.
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Note: When you download and install the Java Development Kit (JDK), the associated Java Runtime Environment (JRE) is also installed. |
JDK 7u6 and later releases include JavaFX SDK (version 2.2 or later). The JavaFX SDK and Runtime are installed and integrated into the standard JDK directory structure.
For information about how to work with JavaFX, see http://docs.oracle.com/javase/8/javase-clienttechnologies.htm.
This procedure installs the Java Development Kit (JDK) for 64-bit Linux, using an archive file (.tar.gz).
These instructions use the following files:
jdk-8uversion-linux-x64.tar.gz and jdk-8uversion-linux-aarch64.tar.gz (version 8u271 and later) for 64-bit ARM systems.
Download the required file.
Before the file can be downloaded, you must accept the license agreement. The archive file can be installed by anyone (not only root users), in any location that you can write to. However, only the root user can install the JDK into the system location.
Change directory to the location where you would like the JDK to be installed, then move the .tar.gz archive file to the current directory.
Unpack the archive file and install the JDK.
% tar zxvf jdk-8uversion-linux-x64.tar.gz% tar zxvf jdk-8uversion-linux-aarch64.tar.gzThe Java Development Kit files are installed in a directory called jdk1.8.0_version in the current directory.
Delete the .tar.gz file if you want to save disk space.
This procedure installs the Java Development Kit (JDK) for 64-bit RPM-based Linux platforms, such as Oracle, Red Hat and SuSE, using an RPM binary file (.rpm) in the system location. You must be root to perform this installation.
These instructions use the following files:
jdk-8uversion-linux-x64.rpm and jdk-8uversion-linux-aarch64.rpm (version 8u271 and later) for 64-bit ARM systems.
Download the required file.
Before the file can be downloaded, you must accept the license agreement.
Become root by running su and entering the super-user password.
Uninstall any earlier installations of the JDK packages.
# rpm -e package_name
Install the package:
# rpm -ivh jdk-8uversion-linux-x64.rpm# rpm -ivh jdk-8uversion-linux-aarch64.rpmTo upgrade a package:
# rpm -Uvh jdk-8uversion-linux-x64.rpm# rpm -Uvh jdk-8uversion-linux-aarch64.rpmDelete the .rpm file if you want to save disk space.
Exit the root shell. No need to reboot.
Starting with version 8u40, the JDK installation is integrated with the alternatives framework and after installation, the alternatives framework is updated to reflect the binaries from the recently installed JDK. Java commands such as java, javac, javadoc, and javap can be invoked from the command line.
Using the java -version command, users can confirm the default (recently installed) JDK version.
In addition, users can now check which specific RPM package provides the java files:
rpm -q --whatprovides java
Prior to JDK 8u261, the JDK RPM installers registered two groups of symbolic links with the alternatives framework, java and javac. In some versions of the alternatives framework, certain link names in these groups were duplicated, which resulted in installation failures.
Starting with JDK 8u261, the JDK RPM doesn't register the javac group with the alternatives framework. All links unique to the javac group are moved into the java group, but the set of symbolic links registered by the installer are not changed; only the duplicated links have been dropped.
The implication of this change is that if you install JDK 8u261 and JDK 8u251 (or older versions) and uninstall JDK 8u261, the symbolic links from the java group that are managed by the alternatives framework will be deleted. To restore the deleted links, run the following command:
/usr/sbin/alternatives --auto java
This procedure installs the Java Development Kit (JDK) for 32-bit Linux, using an archive file (.tar.gz).
These instructions use the following file:
jdk-8uversion-linux-i586.tar.gz
Download the file.
Before the file can be downloaded, you must accept the license agreement. The archive file can be installed by anyone (not only root users), in any location that you can write to. However, only the root user can install the JDK into the system location.
Change directory to the location where you would like the JDK to be installed, then move the .tar.gz archive file to the current directory.
Unpack the archive file and install the JDK.
% tar zxvf jdk-8uversion-linux-i586.tar.gz
The Java Development Kit files are installed in a directory called jdk1.8.0_version in the current directory.
Delete the .tar.gz file if you want to save disk space.
This procedure installs the Java Development Kit (JDK) for 32-bit RPM-based Linux platforms, such as Red Hat and SuSE, using an RPM binary file (.rpm) in the system location. You must be root to perform this installation.
These instructions use the following file:
jdk-8uversion-linux-i586.rpm
Download the file.
Before the file can be downloaded, you must accept the license agreement.
Become root by running su and entering the super-user password.
Uninstall any earlier installations of the JDK packages.
# rpm -e package_name
Install the package.
# rpm -ivh jdk-8uversion-linux-i586.rpm
To upgrade a package:
# rpm -Uvh jdk-8uversion-linux-i586.rpm
Exit the root shell. No need to reboot.
Delete the .rpm file if you want to save disk space.
Starting with version 8u40, the JDK installation is integrated with the alternatives framework and after installation, the alternatives framework is updated to reflect the binaries from the recently installed JDK. Java commands such as java, javac, javadoc, and javap can be invoked from the command line.
Using the java -version command, users can confirm the default (recently installed) JDK version.
In addition, users can now check which specific RPM package provides the java files:
rpm -q --whatprovides java
Since JDK version 8, the JDK RPMs are signed with OL keys. Installation of these RPMs on Linux distributions other than OL gives a warning message indicating that security validation of the package fails. This indicates that the public key used to sign this RPM needs to be installed in the system. A sample warning message and the public key installation steps are as follows:
jdk-8u281-ea-bin-b03-linux-amd64-20_oct_2020.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Download the key file from https://yum.oracle.com/RPM-GPG-KEY-oracle-ol7 using the following command:
wget https://yum.oracle.com/RPM-GPG-KEY-oracle-ol7
Install the key using the following command:
sudo rpm --import RPM-GPG-KEY-oracle-ol7
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Note: Public key installation needs to be done only once. The key installation is persistent across reboots. |
This topic describes general installation topics.
Installing the software automatically creates a directory called jdk1.8.0_version. Note that if you choose to install the JDK into system-wide location, such as /usr/jdk, you must first become root to gain the necessary permissions. If you do not have root access, simply install the JDK into your home directory, or a subdirectory that you have permission to write to.
If you install the software in a directory that contains a subdirectory named jdk1.8.0_version, the new software overwrites files of the same name in that jdk1.8.0_version directory. Please be careful to rename the old directory if it contains files you would like to keep.
By default, the installation script configures the system such that the backing store for system preferences is created inside the JDK's installation directory. If the JDK is installed on a network-mounted drive, it and the system preferences can be exported for sharing with Java runtime environments on other machines.
See http://docs.oracle.com/javase/8/docs/technotes/guides/preferences/index.html for more information about preferences in the Java platform.
