If install.sh is run with a -path argument that contains "firebird", it fails with error saying that Firebird server is running.
:/build/Firebird-22.214.171.124900-0.amd64# ./install.sh -path /mnt/sdb/firebird
Firebird 126.96.36.199900-0.amd64 Installation
Press Enter to start installation or ^C to abort
An instance of the Firebird server seems to be running.
Please quit all Firebird applications and then proceed.