In comp.os.linux.misc Matthew Lincoln <kmlincoln100@hotmail.com> wrote:
> As I learned from the man page of rsync I can exclude a certain
> directory (trees) by using the --exclude option like in
> rsync .... --exclude=/proc ....

> But how do I exclude multiple directory (trees) at once in such a
> rsync command?

You get good marks for reading the man page. (You'd be amazed how many
people don't even bother to try...) I think the bit you missed is this:

Note also that the --filter, --include, and --exclude options take one
rule/pattern each. To add multiple ones, you can repeat the options
on the command-line [...]

Personally, I don't find the interaction between the --include/--exclude
directives particularly intuitive. If it's simply a case of "exclude
this and that", then you should be fine. However, as soon as I wanted to
"include this but exclude that", I ended up taking some of the working
examples (from the man page) and tweaking them until I got something
that worked.

Chris