how to check a file exist in unlix server from your local pc

Not sure if there is a direct way to do this.

I see the following url where it tell you.
http://stackoverflow.com/questions/7120102/how-can-i-access-to-a-file-exists-on-remote-machine

In the past, i created a web service hosted on remote host that will run any command on remote host thru web service request from local machine.

Hope this helps.
Regards,
Rao.