rsync with ssh
 

I set up the keys so that I can log in via ssh without having to enter a password, so that I can do a backup from another machine. It works fine when I do but, when I do I get this error "ssh: connect to host ssh port 22: No route to host"

I've not seen that syntax before.

The rsync man page has this example:
rsync -az -e ssh --delete ~ftp/pub/samba nimbus:"~ftp/pub/tridge"

I've never seen syntax the way you have it.

I'd suggest:

rsync -aruzvn -e ssh --delete /home/files/ 192.168.1.13:/home/files/

Why is the -e option separate from the other rsync options?

Specifies remote shell to use, as in -e ssh. So it's not grouped with the other rsync options. Though from the man page, modern rsync uses ssh by default, so no need for that in most cases.