Facing issue in Postgres loading extension

Question

I am trying to to load pgrouting in extension in postgis database named as "routing" the problem I am facing is I type in osgeo shell in "C:\Program Files (x86)\Boundless\OpenGeo\bin" "psql -U postgres routing" and it gives the error of "psql : illegal option --u"

Answer 1

Are you sure, that your wrote "-U" and not "-u" in lower case? Because this is what the error tells you. If you connect to the database routing using: psql -U postgres routing then it should be all right.