How to install PostGIS 1.5 on Debian 6.0 (squeeze) from packages

Component	Version
​PostGIS	1.5.1
​PostgreSQL	8.4.11
​PROJ	4.7.0
​GEOS	3.2.0

Either log-in as root, or use "su - root" from a user account with admin privileges. Install everything using:

apt-get install postgresql-8.4-postgis

Accept and install the approx 12 packages.

Complete a post-install by creating a template, which can be re-used for creating multiple spatially-enabled databases. Or if you just want to make one spatially enabled database, you can modify the commands for your needs.

Log-in as postgres from root using "su - postgres", and use the following commands:

createdb template_postgis
createlang plpgsql template_postgis
psql -d template_postgis -f /usr/share/postgresql/8.4/contrib/postgis-1.5/postgis.sql
psql -d template_postgis -f /usr/share/postgresql/8.4/contrib/postgis-1.5/spatial_ref_sys.sql
psql -d template_postgis -f /usr/share/postgresql/8.4/contrib/postgis_comments.sql