Installing nautilus:

First you should have a licensed, working install of CCP4 version 6.1.13
or later.
This 'nautilus' package contains binaries of nautilus
compiled for Linux/x86, and distributed as proprietary software.

You may install this software for your use within your site for testing
and structure solution. You may not modify or redistribute it.
This software includes Clipper and kiss-fft, see the accompanying
COPYING* files for license details.

To install the software, unpack it in a temporary directory. The
program is in the bin directory, the documentation in the html
directory. A library file, nautilus_lib.pdb, is required to run the
program and is in the share directory. You need to copy this to
wherever you will be running the program, or alternatively specify the
path and filename with the -pdbin-ref option.