* [Ubuntu 20.04](../appendix/Install-on-Ubuntu-20.md)
* [Ubuntu 18.04](../appendix/Install-on-Ubuntu-18.md)
* [CentOS 8](../appendix/Install-on-Centos-8.md)
- * [CentOS 7.2](../appendix/Install-on-Centos-7.md)
These OS-specific instructions can also be found in executable form
in the `vagrant/` directory.
!!! Warning
For larger installations you **must have** PostgreSQL 11+ and Postgis 3+
otherwise import and queries will be slow to the point of being unusable.
+ Query performance has marked improvements with PostgrSQL 13+ and Postgis 3.2+.
For compiling:
For running Nominatim:
- * [PostgreSQL](https://www.postgresql.org) (9.5+ will work, 11+ strongly recommended)
+ * [PostgreSQL](https://www.postgresql.org) (9.6+ will work, 11+ strongly recommended)
* [PostGIS](https://postgis.net) (2.2+ will work, 3.0+ strongly recommended)
* [Python 3](https://www.python.org/) (3.6+)
* [Psycopg2](https://www.psycopg.org) (2.7+)
also check out the osm2pgsql subproject:
```
-git clone --recursive git://github.com/openstreetmap/Nominatim.git
+git clone --recursive https://github.com/openstreetmap/Nominatim.git
```
The development version does not include the country grid. Download it separately: