In /usr/lib:
lrwxrwxrwx 1 root root 37
Dec 22 09:57 /usr/lib/libfbclient.so -> ../../opt/firebird/lib/libfbclient.so*
lrwxrwxrwx 1 root root 39
Dec 22 09:57 /usr/lib/libfbclient.so.1 -> ../../opt/firebird/lib/libfbclient.so.1*
lrwxrwxrwx 1 root root 43
Dec 22 09:57 /usr/lib/libfbclient.so.1.5.1 -> ../../opt/firebird/lib/libfbclient.so.1.5.1*
lrwxrwxrwx 1 root root 32
Dec 22 09:57 /usr/lib/libgds.so -> /opt/firebird/lib/libfbclient.so*
lrwxrwxrwx 1 root root 32
Dec 22 09:57 /usr/lib/libgds.so.0 -> /opt/firebird/lib/libfbclient.so*
In /opt/firebird/lib:
lrwxrwxrwx 1 root root 16
Dec 22 09:57 libfbclient.so -> libfbclient.so.1*
lrwxrwxrwx 1 root root 20
Dec 22 09:57 libfbclient.so.1 -> libfbclient.so.1.5.1*
-r-xr-xr-x 1 firebird firebird 505592 Jul 14 18:33 libfbclient.so.1.5.1*
-r-xr-xr-x 1 firebird firebird 3300 Jul 14 18:33 libib_util.so*