Man page - pg_dropcluster(1)
Packages contains this manual
apt-get install postgresql-common
Manual
PG_DROPCLUSTER
NAMESYNOPSIS
DESCRIPTION
SEE ALSO
AUTHOR
NAME
pg_dropcluster - completely delete a PostgreSQL cluster
SYNOPSIS
pg_dropcluster [ --stop ] cluster-version cluster-name
DESCRIPTION
This program removes all files that belong to a given PostgreSQL cluster; that includes the data, wal, and tablespace directories, the log file, and all configuration files that were created by pg_createcluster (1). If the configuration directory (/etc/postgresql/ version / cluster ) is empty after this, it is removed as well. An empty socket directory other than /var/run/postgresql or /tmp is also removed.
Usually a cluster which still has a running server attached will not be deleted. To override this, the --stop option forces a server shutdown before the files are removed.
SEE ALSO
pg_createcluster (1), pg_ctlcluster (1)
AUTHOR
Martin Pitt <mpitt@debian.org>