I've seen a few questions similar to this, however, I'm hesitant to follow them as I've already broken Ubuntu once and had to reinstall while trying to get custom themes to work on my machine.
Basically, I have a copy of Eclipse installed and it runs properly but I have to navigate to the installation folder rather than search for it in Unity or lock it to the launcher. I've gathered that I need to move the installation folder to the 'opt' directory and create a desktop file of some kind with the information for the application. I have absolutely no idea how to move files with Terminal and I cannot place the files in the directory through the native file manager.
Could someone please walk me through this step by painstaking step? Please do not assume I know anything specific too Ubuntu or Linux. I also have little experience with Windows command line.
At present the eclipse launcher is here: /home/USERNAME_HIDDEN/eclipse/java-neon/eclipse
Thanks in advance to anyone who would be willing to help me.