If you give no parameters on the command line, then fs looks for a configuration file. By default, it looks for a file called fs.cfg in the Fileshare directory, that is, the directory where you started fs. You can use the /cf (Windows) or -cf (UNIX) parameter to specify a different path and/or filename.
For example, you could have a configuration file c:\fsdir\fsconf.cfg (Windows) /home/fsdir/fsconf.cfg (UNIX) containing:
Windows:
/s server1 /tr f
UNIX:
-s server1 -tr f
and start your server server1, from your application command prompt, by entering:
Windows:
fs /cf fsconf.cfg
UNIX:
fs -cf fsconf.cfg