How to

PostgreSQL format decimal separator from point to comma

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How to change the decimal separator without changing the representation in the Postgres database

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Step-by-step commands to upgrade PostgreSQL clusters between versions on Ubuntu.

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Use Restrictions.sqlRestriction(“1=1 order by rand()”) as a simple workaround for random ordering in Criteria.

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Spring configuration for JavaMailSenderImpl and a mail utility wrapper for sending plain text emails.

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How to change the admin password for Glassfish (asadmin change-admin-password) and for a specific domain.

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Example showing extern “C” { #include “c.h” } to include C headers in C++ sources.

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Step-by-step guide to download, extract, start Glassfish 4 and add an init script for automatic startup.

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Install Oracle Java 7 on Ubuntu 12.04 LTS with the webupd8 PPA and apt-get.