Installing OpenJDK 8

Temporarily in LOCKSS 2.0-alpha2, Java 8 is needed on the host machine to run the Solr upgrade tool. (In the future, this process will be packaged in a way that does not require Java to be installed.)

Debian, Ubuntu, etc.

On the command line, type:

sudo apt-get install openjdk-8-jre

Fedora, Oracle Linux, Red Hat Enterprise Linux, etc.

On the command line, type:

sudo yum install java-1.8.0-openjdk