Meteor & mup - on linux server -

i have installed meteor app mup on linux server app files appear in

/opt/myapp 

when run myapp start

start: job running: myapp 

in setting files have

"root_url": "http://xx.xxx.xxx.xx",

wat url should app resolve to? have tried

"root_url": "http://xx.xx.xxx.xxx/myapp",

the correct way use mup stop/start, don't log server , use upstart manually. root_url should http://yourapp.com, not use subdirectories it'll confuse router.