Error during install extensions in Postgresql 9.2 - sql

Question

I have tried following:
sudo -u postgres psql <enter>
create extension "uuid-ossp";
but showing error: ERROR: could not access file "$libdir/uuid-ossp": No such file or directory
I have tried: select version(). It's showing my postgresql version PostgreSQL 9.2.4 on x86_64-unknown-linux-gnu, compiled by gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1, 64-bit
Later tried to install extension adminpack using create extension "adminpack" but it's also throwing error: ERROR: could not open extension control file "/usr/local/share/postgresql/extension/adminpack.control": No such file or directory
I have tried locate uuid-ossp which gave me following result:
/usr/src/postgresql-9.2.4/contrib/uuid-ossp
/usr/src/postgresql-9.2.4/contrib/uuid-ossp/Makefile
/usr/src/postgresql-9.2.4/contrib/uuid-ossp/uuid-ossp--1.0.sql
/usr/src/postgresql-9.2.4/contrib/uuid-ossp/uuid-ossp--unpackaged--1.0.sql
/usr/src/postgresql-9.2.4/contrib/uuid-ossp/uuid-ossp.c
/usr/src/postgresql-9.2.4/contrib/uuid-ossp/uuid-ossp.control
/usr/src/postgresql-9.2.4/doc/src/sgml/uuid-ossp.sgml
/usr/src/postgresql-9.2.4/doc/src/sgml/html/uuid-ossp.html
locate adminpack is giving following result:
/usr/lib/postgresql/9.1/lib/adminpack.so
/usr/share/postgresql/9.1/extension/adminpack--1.0.sql
/usr/share/postgresql/9.1/extension/adminpack.control
/usr/src/postgresql-9.2.4/contrib/adminpack
/usr/src/postgresql-9.2.4/contrib/adminpack/Makefile
/usr/src/postgresql-9.2.4/contrib/adminpack/adminpack--1.0.sql
/usr/src/postgresql-9.2.4/contrib/adminpack/adminpack.c
/usr/src/postgresql-9.2.4/contrib/adminpack/adminpack.control
/usr/src/postgresql-9.2.4/doc/src/sgml/adminpack.sgml
/usr/src/postgresql-9.2.4/doc/src/sgml/html/adminpack.html

Answer 1

At a wild guess, you've downloaded the PostgreSQL 9.2 sources to /usr/src, unpacked it, configured it, compiled and installed it ... but not installed the contribs.
If so, from the PostgreSQL source dir:
cd contrib && make && sudo make install
If you want updated PostgreSQL releases, it's usually better to get them packaged unless you need/want to make source code changes. See http://yum.postgresql.org/, http://apt.postgresql.org/, http://www.postgresql.org/download/, ...
Update: Some of these have dependencies. E.g. for uuid-ossp you must install the ossp-uuid lib first:
apt-get install libossp-uuid-dev
then compile and install contrib/uuid-ossp:
cd contrib/uuid-ossp && make && make install
Check the error output from the make step for more info, and if in doubt, remember, Google. The first error is usually the most important.

Answer 2

For those who come across this and are installing a specific version of Postgresql (e.g. 9.6):
Make sure you install the same version of contrib:
yum install postgresql96-server postgresql96-contrib
When I originally install postgresql96-server using directions from PostgreSQL website, it didn't mention installing contrib, so I installed the wrong version later on - forgetting I didn't use the default version in the CentOS repos.