• Ставится 1-2 минуты

# apt install default-jre-headless # need for openfire

debian9# apt install openjdk-8-jre   # need for spark
debian10# apt install openjdk-11-jre

# apt install openjdk-7-jre

# pkg install openjdk8-jre

• http://www.oracle.com/technetwork/java/index.html
• http://val.bmstu.ru/unix/java/jre-7u9-windows-i586.exe