Comment 1968 added to page installation.html of version 7.4

Author: kwang 
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On Debian Systems, the "short version" of the setup above should use the following, including the different directories. 

to install the package
 apt-get update
 apt-get install postgresql

initialize the database system
 su 
 su - postgres
 /usr/lib/postgresql/bin/initdb -D /var/lib/postgres/data
 /etc/init.d/postgresql start

that's it. once running, you can use it, e.g.
 /usr/local/pgsql/bin/createdb test
 /usr/local/pgsql/bin/psql test
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Manual page: http://wwwmaster.postgresql.org/docs/7.4/interactive/installation.html
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