Nautilus is the official file manager for the GNOME desktop. The name is a play on words, evoking the shell of a nautilus to represent an operating system shell. Nautilus replaced Midnight Commander in GNOME 1.4 (2001) and has been the default from version 2.0 onwards. Nautilus was the flagship product of the now-defunct Eazel Inc company. Released under the terms of the GNU Lesser General Public License, Nautilus is free software. Many different add ons are now available to customize how Nautilus works, the forever favorite Open-Terminal-Here is a bit hit with most avid Linux users, since the new release of Ubuntu 16.04 it seems that this functionality has been merged directly into the GNOME3 desktop and is no longer available through normal channels such as launchpad. However if really want this feature back in your right-click menu you are in luck, now this is not exactly the same as what you may be use to but still offers the ability without having to install a ton of GNOME dependent files just to enable a simple feature.
Just in case if you have not already installed Nautilus in your system. If you have it installed already you may skip this step and move on to the next one.
$ sudo apt-get install nautilus
5.) Accept Packages.
Again you are presented with a list of packages that are required by Nautilus Actions to be installed on your system, review the lest and once satisfied type ‘y’ and press Enter to continue.