Linux hints
From Klaus' wiki
Comparing two files
In general comparing two files can be done like this:
diff <firstfile> <secondfile>
To compare two files of which one resides on another system issue this command:
vim -d <firstfile> scp://<remote-system>//<path-to-file>/<secondfile>
To compare two files both resident on different systems issue this command:
vim -d scp://<first-remote-system>//<path-to-file>/<firstfile> scp://<second_remote-system>//<path-to-file>/<secondfile>
where <remote-system> is either the IP address or its hostname including domain as in bren.hih.au.dk