How to install PostgreSQL 9.2 on ubuntu server using PPA

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http://www.ubuntugeek.com – PostgreSQL, often simply Postgres, is an object-relational database management system (ORDBMS) available for many platforms including Linux, FreeBSD, Solaris, Microsoft Windows and Mac OS X. It is released under the PostgreSQL License, which is an MIT-style license, and is thus free and open source software. PostgreSQL is developed by the PostgreSQL Global Development Group, consisting of a handful of volunteers employed and supervised by companies such as Red Hat and EnterpriseDB.It implements the majority of the SQL:2008 standard,is ACID-compliant, is fully transactional (including all (HowTos)