If, after installing meteor server, you get an error like
Meteor::Socket bind: Address already in use at Meteor/Socket.pm line 115.
when trying to start it up with
./meteord -d or
/etc/init.d/meteord start, it means that you likely have another instance of meteor running.
Unless you have changed ports around, you can kill the exising instance of meteor with
pkill meteor or simply use it without starting a new one 😉