[pgrouting-users] Loading pgrouting does not work

[Jakob Miksch]

Loading pgrouting does not work:

routing=# CREATE EXTENSION pgrouting;
FEHLER:  konnte Erweiterungskontrolldatei 
„/usr/share/postgresql/9.4/extension/pgrouting.control“ nicht öffnen: 
Datei oder Verzeichnis nicht gefunden


--> ENGLISH: could not open or find extension control file


However, I installed pgrouting like described here: 
http://workshop.pgrouting.org/chapters/installation.html

I use Ubuntu 14.04

Any suggestion how to fix that?

thanks and best wishes,
Jakob