noob question about using rsync on a network
I am trying to setup rsync to backup one of my WinXP machines; if I can get this working I want to then set up a cron job to run the backup automatically. I can get rsync to work just fine on the local machine but I can't figure out how to address the remote machine that I want to backup.
I tried using
rsync -av hplaptop:Gary/Documents /root/Documents
and many variants of that but no good. I also tried to access my other Fedora machine from this one as a test but it didn't work either.
I can transfer files back and forth among all of these machines so my network seems to fine.
The error I get is ssh: hplaptop: Name or service not known
Thanks in advance,