Historical version. PostgreSQL 9.3 has reached end of support. 2018-11-08. See the current manual.
15.1. Short Version
./configure gmake su gmake install adduser postgres mkdir /usr/local/pgsql/data chown postgres /usr/local/pgsql/data su - postgres /usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data /usr/local/pgsql/bin/postgres -D /usr/local/pgsql/data >logfile 2>&1 & /usr/local/pgsql/bin/createdb test /usr/local/pgsql/bin/psql test
The long version is the rest of this chapter.
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Read the upstream documentation. For corrections, first check the current manual.