Filemerge and opendiff

Comparing two files with FileMerge

Either files can be drag'n'dropped or filepaths can be used.
Remote servers (such as Galaxy) need to be mounted in the Finder
(mount_Produktie if that alias has been set).
The usage of filepaths is generally more convenient, especially
when files are burried deep in the system. With a ssh connection
(Produktie if that alias has been set) file paths can be obtained using:
readlink -f filename
In Galaxy this will result in: /home/galaxy/path/to/file
Be aware that the mountpoint in the Finder will be different;
For the Production-server the path will be:
/Users/dickgroenenberg/Documents/Mountpoints/Produktie/galaxy/path/to/file

To start Filemerge and compare files on Galaxy from the terminal:
opendiff /Users/dickgroenenberg/Documents/Mountpoints/Produktie/galaxy/path/to/file_1 /Users/dickgroenenberg/Documents/Mountpoints/Produktie/galaxy/path/to/file_2

Edit a remote file with Textmate

Remote files can be edited by either opening the files on the remote volume
via a mounted path:
mate /Users/dickgroenenberg/Documents/Mountpoints/Produktie/galaxy/path/to/file
(this assumes the mate shell commmand is installed).

Alternatively, a better option might be to use rmate
directly in the ssh session.
Rmate method makes use of Reverse SSH Tunneling.