Prakash Ramakrishnan <prakash.ramakrishnan.ap@nielsen.com> writes:
>>> postgres=# create extension postgis;
>>> ERROR: could not open extension control file
>>> "/usr/pgsql-11/share/extension/postgis.control": No such file or directory
> Yes, it's done. Already installed postgis but not able to create the
> extension.
Well, it's not there in the installation you're using. I speculate
that you are using PGDG server RPMs but installed a Postgis RPM that's
meant to go with Red Hat's postgresql RPMs. The file layouts are
different between the two sets of RPMs, so mix-and-match won't work.
regards, tom lane