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

The following describes how to install Postgresql 9.4, PostGIS 2.1, PGAdmin 1.20 and shp2pgsql-gui on Ubuntu versions 12.04 and 14.04.1

Run these in terminal:
== Verify what 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
So if you see you are running precise (12.04) do this

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

If trusty (14.04)

{{{
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt trusty-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 9.4, PostGIS, PGAdmin3, and additional supplied modules including '''adminpack'''

{{{
sudo apt-get install postgresql-9.4 pgadmin3 postgresql-contrib
}}}

For 12.04 thru 13.02, this seems to work

{{{
sudo apt-get install postgresql-9.4-postgis pgadmin3 postgresql-contrib
}}}

If you are running 14.04 (Trusty) -- you need to do this

{{{
sudo apt-get install postgresql-9.4-postgis-2.1 pgadmin3 postgresql-contrib
}}}


== To get pgRouting ==
(instructions from http://workshop.pgrouting.org/chapters/installation.html  seems to work fine with PostgreSQL Apt repo PostgreSQL 9.3 install)
{{{
sudo apt-add-repository -y ppa:georepublic/pgrouting
sudo apt-get update
# Install pgRouting package (for Ubuntu 14.04)
sudo apt-get install postgresql-9.4-pgrouting

}}}
== Enable Adminpack ==

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

{{{
sudo -u postgres psql
}}}

{{{
CREATE EXTENSION adminpack;
}}}

Quit psql:

{{{
\q
}}}

== 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 su - postgres
}}}

{{{
createuser -d -E -i -l -P -r -s yourUserName
}}} 

(be sure to change the username to your desired username)

Enter your new password when prompted

Log out as {{{postgres}}} user:

{{{
exit
}}}

Exit terminal:

{{{
exit
}}}

== Use PGAdmin to log into database server ==

From the Ubuntu launcher, type in PGAdmin to reveal the application

Click the {{{Add a connection to server}}} button on the menu in the top-left corner

Fill in the necessary credentials to log in:

{{{
- Name: nickname you want to give your connection
- host: localhost (until you change the connection settings)
- port: 5432 by default
- maintenance DB: postgres by default
- username: whatever you chose in the step above
- password: whatever you chose in the step above
}}}

== Enable postgis extensions on new database ==

Since you installed PostgreSQL and PostGIS from the PostgreSQL apt repository, you now have all the extensions for PostgreSQL, including PostGIS

Expand the database tree in PGAdmin, and reveal the extensions node

Right-click the extensions node, and click {{{new extension}}}

Enable the '''postgis''' extension, as well as '''postgis_topology''', and ```postgis_tiger_geocoder```

Alternatively from psql console you can do

{{{
CREATE EXTENSION postgis;
CREATE EXTENSION postgis_topology;
CREATE EXTENSION fuzzystrmatch;
CREATE EXTENSION postgis_tiger_geocoder;
}}}


== 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.

Open terminal, and type:

{{{
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"