Try using ./servoy_server & to make it a background process.
Not every shell keeps that open when you close your session though.
So if that doesn’t work then use the screen command.
For more info use ‘man screen’.
what distro are you using?
You can download my SuSE Linux Sevoy start script here: http://www.xpertmind.de/servoy/servoysrvstart.tgz, with it you can start the server automatically (using run levels).
With some adjustment can be used for with other distributions too.
Proper way to start Servoy server would be:
SERVOY_BINARY > SERVOY_LOG_FILE 2>&1 &
2>&1 is redirecting both standard and error output in the same file SERVOY_LOG_FILE.