The [http://wiki.postgresql.org/wiki/Apt PostgreSQL Apt Repository]  now hosts installs of PostGIS, pgRouting, in addition to Postgresql and PGAdmin3.

The following describes how to install Postgresql 9.5, PostGIS 2.2, pgRouting, PGAdmin on Ubuntu version 16.04. It is assumed to also work on Linux Mint, Lubuntu, and Xubuntu.

Run these in terminal:
== Verify what version of Ubuntu you are running ==
{{{
sudo lsb_release -a 
}}}


== Add Respository to sources.list ==

You'll need to replace the nickname below with what you are running.
Note to replace the word trusty with whatever version lsb states

Helper on [http://www.postgresql.org/download/linux/ubuntu/]

For xenial (16.04.2 LTS)

{{{
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt xenial-pgdg main" >> /etc/apt/sources.list'
}}}


== Add Keys ==
{{{
wget --quiet -O - http://apt.postgresql.org/pub/repos/apt/ACCC4CF8.asc | sudo apt-key add -
}}}

{{{
sudo apt-get update
}}}

== Install == 
The following will install postgresql 9.6, PostGIS 2.3, PGAdmin4, pgRouting 2.3 and additional supplied modules including the '''adminpack''' extension:


{{{
sudo apt-get install postgresql-9.6
sudo apt-get install postgresql-9.6-postgis-2.3 postgresql-contrib-9.6

#to get the commandline tools shp2pgsql, raster2pgsql you need to do this
sudo apt-get install postgis
}}}

== To get pgRouting ==
{{{
# Install pgRouting 2.3 package 
sudo apt-get install postgresql-9.6-pgrouting

}}}
== Enable Adminpack ==

While in terminal, log in to the psql console as postgres user:

{{{
sudo -u postgres psql
}}}



{{{
CREATE EXTENSION adminpack;
}}}



Never install PostGIS in the postgres database, create a user database
You can also enable the PostGIS extension here (or with the GUI as described below):

{{{
sudo -u postgres psql
}}}

{{{
CREATE DATABASE gisdb;
\connect gisdb;

CREATE SCHEMA postgis;
ALTER DATABASE gisdb SET search_path=public, postgis, contrib;
\connect gisdb;  -- this is to force new search path to take effect
CREATE EXTENSION postgis SCHEMA postgis;
SELECT postgis_full_version();
}}}

should give you output something like this:


{{{
                                                                           postgis_full_version
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 POSTGIS="2.3.2 r15302" GEOS="3.5.0-CAPI-1.9.0 r4084" PROJ="Rel. 4.9.2, 08 September 2015" GDAL="GDAL 1.11.3, released 2015/09/16" LIBXML="2.9.3" LIBJSON="0.11.99" RASTER
(1 row)
}}}

Installing postgis_sfcgal, if you need advanced 3D support


{{{
CREATE EXTENSION postgis_sfcgal SCHEMA postgis;
SELECT postgis_full_version();
}}}

should give you:


{{{
                                                                                   postgis_full_version
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 POSTGIS="2.3.2 r15302" GEOS="3.5.0-CAPI-1.9.0 r4084" SFCGAL="1.2.2" PROJ="Rel. 4.9.2, 08 September 2015" GDAL="GDAL 1.11.3, released 2015/09/16" LIBXML="2.9.3" LIBJSON="0.11.99" RASTER
(1 row)
}}}




Install pgRouting

{{{
CREATE  EXTENSION pgrouting;
SELECT * FROM pgr_version();
}}}

should give you:


{{{
 version |  tag   |   hash    | branch | boost
---------+--------+-----------+--------+--------
 2.3.2   | v2.3.2 | 1f2af3c52 | master | 1.58.0
(1 row)
}}}




Exit the psql console:

{{{
\q
}}}


== Open Access to Clients ==

If you need to allow access from external, you can do this as well
{{{
sudo -u postgres psql
}}}

{{{
ALTER SYSTEM SET listen_addresses='*'; 
\q
}}}

You may need to edit to pg_hba.conf and/or pg_ident.conf to allow external access 

{{{
sudo nano /etc/postgresql/9.6/main/pg_hba.conf
}}}

If you need external access, scroll to the bottom of the pg_hba.conf file and add a line like this (which willa llow all clients with md5 password encrypt authentication (right after the local rules):

{{{
hostssl    all             all             0.0.0.0/0               md5
}}}

Click CTRL-X to save your changes, Y to write them to the file, and enter to exit.

If you change ip or port, you need to do a service restart.

{{{
sudo service postgresql restart 
}}}

Note: you can also do from postgres psql console with below - only for changes that don't require restart)

{{{
SELECT pg_reload_conf();
}}}


== Optional: check location of configuration files: ==

From the psql console(see above):
 
{{{
SELECT name, setting FROM pg_settings where category='File Locations';
}}}

Which will output something like:

{{{

       name        |                 setting
-------------------+------------------------------------------
 config_file       | /etc/postgresql/9.6/main/postgresql.conf
 data_directory    | /var/lib/postgresql/9.6/main
 external_pid_file | /var/run/postgresql/9.6-main.pid
 hba_file          | /etc/postgresql/9.6/main/pg_hba.conf
 ident_file        | /etc/postgresql/9.6/main/pg_ident.conf
(5 rows)

}}}



== Create new PGSQL user ==

You can create a new database super user to use instead of the default {{{postgres}}} user.

While in terminal, run:

{{{
sudo -u postgres psql
CREATE ROLE mysuperuser LOGIN PASSWORD 'whatever' SUPERUSER;
}}}



== Import SHP files using shp2pgsql-gui ==

Another handy piece of software {{{shp2pgsql-gui}}} tool. This will allow you to quickly connect to your new PostGIS database and import a Shapefile.
Note this will only work if you have Ubuntu with a desktop (not a headless Ubuntu)

Open terminal, and type:

{{{
sudo apt-get install postgis-gui
}}}

(Note: this is coming from the main Ubuntu software repository, as it seems the PostgreSQL APT repository doesn't package SHP2PGSQL-GUI anymore...)

Now open the SHP2PGSQL application:

{{{
shp2pgsql-gui
}}}

Follow the on-screen prompts to load your data.

For more information, visit the [http://www.bostongis.com/PrinterFriendly.aspx?content_name=postgis_tut01 Boston GIS] tutorial in the section "Load Towns Data"