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Weekend Project: Add PubSubHubbub Syndication to Your Site or Blog

Web syndication formats like RSS and Atom have revolutionized the way we get information, but even though these formats are standardized and widespread, syndication is still evolving. PubSubHubbub is one of the more interesting advancements in syndication technology, because it actually changes the update method used by clients, from traffic-heavy periodic polling to a publisher-push model. Luckily you don't have to choose one or the other; you can add PubSubHubbub support to your site's feeds without losing compatibility with your more "traditional" readers. This weekend, update your feeds to the latest and greatest in syndication and generate your own hubbub.

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Run Applications in Secure Sandboxes with SELinux

Have an application that you want to run, but without giving it full access to the rest of your system? Welcome to SELinux's sandbox utility. In a few fairly simple steps, you can box in an application and not have to worry about it having full access to your system.

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Creating Macros Without Scripting in LibreOffice and OpenOffice.org

If you find yourself doing the same task over and over again in LibreOffice (or OpenOffice.org), you need to learn about macros. Whether it's inserting the same text over and over, formatting text, or any other task where multiple keystrokes or actions are necessary you can save time by creating a macro. LibreOffice (and OpenOffice.org before it) include an outstanding Macro tool that allows you to quickly create and manage macros that will ease the burden of repetitive tasks.

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HOWTO: Reconfigure MySQL to use innodb_file_per_table with zero downtime

InnoDB is a very good storage engine for MySQL that combines reasonable performance with wide popularity and, as a consequence, a good set of tools for diagnostics and fine-tuning. One of its downsides is that it is inefficient when it comes to the disk space management. While an extent of HDD space was added to the storage, InnoDB will not return it back even when you delete tables or databases. To add some flexibility, you should use innodb_file_per_table option. Unfortunately, if you have a running database, you cannot just enable this option. You will have to make a dump of the database and restore it on a new instance of MySQL with the option enabled from the very beginning. This scenario means that the database will be inaccessible from the moment you start mysqldump to the moment you finish restoring the data in the new instance. Is there a way to minimize the downtime?

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Weekend Project: Replace Inetd with Xinetd for Better Network Administration

Xinetd is an alternative to the traditional super-server Internet daemon, inetd, the process that starts and stops all non-persistent network servers. Xinetd acts as a drop-in replacement for inetd, but it can do more than just start and stop services on your Linux machine in response to incoming TCP or UDP connections. The real advantage of Xinetd is that it allows more fine-grained control, including access control lists (ACLs), rate-limiting, time-based access, and stream redirection.

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