unable to open (or read) hostsfile mpd.hosts

I get t开发者_StackOverflowhe following error when I use this command on the cluster : mpdboot -n 4 and the error I get is: unable to open (or read) hostsfile mpd.hosts

What does this mean, and How do I go about fixing this?

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you have to have $HOME/mpd.hosts unless you specify alterantive machine file.