Helen Borrie schrieb:

> On Linux, fbmgr controls the service and root can run fbmgr - so no need
> for usernames and passwords in a shutdown script that calls fbmgr -shut.

Even root cannot shutdown without a password:

root@elmar2:/usr/local/firebird/bin# ./fbmgr.bin -shut
Your user name and password are not defined. Ask your database
administrator to set up a Firebird login.
can not attach to server