> since v2.5 it is possible to use Firebird embedded without install of full CS package.
> All you need is to create the almost the same folders layout as with full Firebird package, including bin, intl, lib, plugin, UDF folders and its contents.
> Create simlink lib/libfbembed.so.2.5 pointing to the lib/libfbembed.so.2.5.2
> Remove not needed binaries from bin folder, if necessary
>
> Set FIREBIRD to the root folder.
> Set LD_LIBRARY_PATH to the lib folder (not to the root !)

Thank you Vlad!!

I have followed these steps and it is working perfectly.

Actually the symlink was already present.

The only other thing I had to do was to delete the /tmp/firebird directory because this did not have user write privileges having been created with the install.sh script.