Installing Java for MiNiFi Java agent

You should install Java on each machine where you will install a MiNiFi Java agent.

Download JDK from the appropriate website.
Run the installation command appropriate for your operating system:
For RHEL/CentOS:
```
yum install java-1.8.0-openjdk
```
For Debian and Ubuntu:
```
apt-get install openjdk-8-jre
```