I wanted to start the boolbd in daemon mode, like the "--detach" parameter of monerod does. My problem is that the daemon starts as a child process of sshd and gets terminated, when the ssh session is closed.
Something like
nohup ./boolbd --no-console >/dev/null 2>&1 &
should work. It literally means "no hangup", and the rest just ensures there's no visible output.