I need instructions to configure Opera to use Java Plug-in Over Redhat Linux 7 ...
My version of Redhat is : Red Hat Enterprise Linux Workstation release 7.3 (Maipo)
And The version for OPERA : 45.0.2552.888
Thanks in advance
Can't be done, Opera (and other Chromium-based browsers) do not support it.
^ This, because they no longer support npapi plugins, and java in npapi only.