Managing Versions of Programs on the Path

This is particularly relevant for Java (especially when wanting to work with Oracle Java), so these instructions will be tailored to that.

1. Install version files (for java to /usr/lib/jvm/jdkx.x.x_xxx)
2. Register with update-alternatives bash sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdkx.x.x_xxx/bin/java" 1 Installation to, command name, program file, priority for auto-selection (not relevant as we will use manual selection)
3. Select which version to use bash sudo update-alternatives --config java Then type the chosen installation number

N.B for java, it is best to do this process for java and javac