install extensions in postgresql

way to get extensions in ubuntu

sudo apt-get install postgresql-contrib

1. libossp-uuid16:amd64 (1.6.2-1.3, automatic)
2. postgresql-contrib-9.1:amd64 (9.1.12-0ubuntu0.13.10, automatic)
3. postgresql-contrib:amd64 (9.3+146really9.1+148)

Action above will download all control file into Postgresql software folder.
Like /usr/share/postgresql/9.1/extension

available extensions list:

adminpack               autoinc
btree_gin               btree_gist
chkpass                 citext
cube                    dblink
dict_int                dict_xsyn
earthdistance           fuzzystrmatch
hstore                  insert_username
int_aggregate           isn
lo                      ltree
moddatetime             pageinspect
pg_buffercache          pgcrypto
pg_freespacemap         pgrowlocks
pg_stat_statements      pgstattuple
pg_trgm                 pgxml
refint                  seg
sslinfo                 tablefunc
test_parser             timetravel
tsearch2                uuid-ossp

1. Version before 9.1

You need to manually install them by psql command:
psql -U user_name -d database_name -f module_name.sql

For example, if your administrative user was named postgres and your database was also named postgres and the module you wanted was tablefunc, you would type:
psql -U postgres -d postgres -f tablefunc.sql

or use \i command in psql:
\i /usr/share/postgresql/9.1/extension/tablefunc--1.0.sql

2. Version after 9.1 included

After 9.1(included) version, postgresql provide new command to install extensions.
CREATE EXTENSION "tablefunc";
That is much easier!