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Any distribution package will do: CentOS, Debian, Ubuntu, RedHat, Fedora. Today, server is tested to be compatible with the following distribution packages:
- CentOS 7.6, 7,8, 8, Stream
- Ubuntu 18.04, 20.04
- Fedora 31, 32, 33
- Debian 9, 10
- Amazon Linux 2
The recommended distribution package is CentOS 7.6 or Ubuntu 18.04, a stable work on older distribution packages is not guaranteed.
Preparing to install
Make sure the server is connected to the Internet and you have root access via SSH.
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Today, the following JDK versions are tested and recommended to use: 8, 12, 14, 15, 16, 17. WSC can be unstable with another JDK versions.
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# Download JDK package
sudo rm -rf jdk*
curl -s https://download.java.net/java/GA/jdk15.0.2/0d1cfde4252546c6931946de8db48ee2/7/GPL/openjdk-15.0.2_linux-x64_bin.tar.gz | tar -zx
[ ! -d jdk-15.0.2/bin ] && exit 1
# Prepare installation folder
sudo mkdir -p /usr/java
[ -d /usr/java/jdk-15.0.2 ] && sudo rm -rf /usr/java/jdk-15.0.2
# Move JDK files to installation folder
sudo mv -f jdk-15.0.2 /usr/java
[ ! -d /usr/java/jdk-15.0.2/bin ] && exit 1
# Make /usr/java/default symlink to installation folder for convenience
sudo rm -f /usr/java/default
sudo ln -sf /usr/java/jdk-15.0.2 /usr/java/default
# Make the necessary symlinks
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/java/jdk-15.0.2/bin/java" 1
sudo update-alternatives --install "/usr/bin/jstack" "jstack" "/usr/java/jdk-15.0.2/bin/jstack" 1
sudo update-alternatives --install "/usr/bin/jcmd" "jcmd" "/usr/java/jdk-15.0.2/bin/jcmd" 1
sudo update-alternatives --install "/usr/bin/jmap" "jmap" "/usr/java/jdk-15.0.2/bin/jmap" 1
sudo update-alternatives --set "java" "/usr/java/jdk-15.0.2/bin/java"
sudo update-alternatives --set "jstack" "/usr/java/jdk-15.0.2/bin/jstack"
sudo update-alternatives --set "jcmd" "/usr/java/jdk-15.0.2/bin/jcmd"
sudo update-alternatives --set "jmap" "/usr/java/jdk-15.0.2/bin/jmap" |
JDK 16
This is the example script for OpenJDK 15 installation using the package downloaded from https://download.java.net/java/GA:
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# Download JDK package
sudo rm -rf jdk*
curl -s https://download.java.net/java/GA/jdk16/7863447f0ab643c585b9bdebf67c69db/36/GPL/openjdk-16_linux-x64_bin.tar.gz | tar -zx
[ ! -d jdk-16/bin ] && exit 1
# Prepare installation folder
sudo mkdir -p /usr/java
[ -d /usr/java/jdk-16 ] && sudo rm -rf /usr/java/jdk-16
# Move JDK files to installation folder
sudo mv -f jdk-16 /usr/java
[ ! -d /usr/java/jdk-16/bin ] && exit 1
# Make /usr/java/default symlink to installation folder for convenience
sudo rm -f /usr/java/default
sudo ln -sf /usr/java/jdk-16 /usr/java/default
# Make the necessary symlinks
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/java/jdk-16/bin/java" 1
sudo update-alternatives --install "/usr/bin/jstack" "jstack" "/usr/java/jdk-16/bin/jstack" 1
sudo update-alternatives --install "/usr/bin/jcmd" "jcmd" "/usr/java/jdk-16/bin/jcmd" 1
sudo update-alternatives --install "/usr/bin/jmap" "jmap" "/usr/java/jdk-16/bin/jmap" 1
sudo update-alternatives --set "java" "/usr/java/jdk-16/bin/java"
sudo update-alternatives --set "jstack" "/usr/java/jdk-16/bin/jstack"
sudo update-alternatives --set "jcmd" "/usr/java/jdk-16/bin/jcmd"
sudo update-alternatives --set "jmap" "/usr/java/jdk-16/bin/jmap" |
JDK 17
This is the example script for OpenJDK 15 installation using the package downloaded from https://download.java.net/java/GA:
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# Download JDK package
sudo rm -rf jdk*
curl -s https://download.java.net/java/GA/jdk17.0.2/dfd4a8d0985749f896bed50d7138ee7f/8/GPL/openjdk-17.0.2_linux-x64_bin.tar.gz | tar -zx
[ ! -d jdk-17.0.2/bin ] && exit 1
# Prepare installation folder
sudo mkdir -p /usr/java
[ -d /usr/java/jdk-17.0.2 ] && sudo rm -rf /usr/java/jdk-17.0.2
# Move JDK files to installation folder
sudo mv -f jdk-17.0.2 /usr/java
[ ! -d /usr/java/jdk-17.0.2/bin ] && exit 1
# Make /usr/java/default symlink to installation folder for convenience
sudo rm -f /usr/java/default
sudo ln -sf /usr/java/jdk-17.0.2 /usr/java/default
# Make the necessary symlinks
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/java/jdk-17.0.2/bin/java" 1
sudo update-alternatives --install "/usr/bin/jstack" "jstack" "/usr/java/jdk-17.0.2/bin/jstack" 1
sudo update-alternatives --install "/usr/bin/jcmd" "jcmd" "/usr/java/jdk-17.0.2/bin/jcmd" 1
sudo update-alternatives --install "/usr/bin/jmap" "jmap" "/usr/java/jdk-17.0.2/bin/jmap" 1
sudo update-alternatives --set "java" "/usr/java/jdk-17.0.2/bin/java"
sudo update-alternatives --set "jstack" "/usr/java/jdk-17.0.2/bin/jstack"
sudo update-alternatives --set "jcmd" "/usr/java/jdk-17.0.2/bin/jcmd"
sudo update-alternatives --set "jmap" "/usr/java/jdk-17.0.2/bin/jmap" |
Installation checking
To check JDK installation use the following command
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