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Gift-WrappedSecurity

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TCP Wrappers are versatile, sophisticated, and surprisingly easy to use, and they can secure your servers from attack with run-time ACL reconfiguration.

Parallel

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Parallel programming is not easy, but one tool you can use to help parallelize your application is OpenMP. Most compilers are compatible with OpenMP and allow you to parallelize your code on a single node.

Utile

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The outstanding Netcat is often referred to as the Swiss Army Knife of networking; to say that it is versatile is the biggest understatement you will hear in a while.

Time Out

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This month, we examine a Unix system's stopwatch options.

Substitute

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Apache web servers generally use the mod_php module to run PHP programs, but the official PHP package also contains a little-acclaimed alternative by the name of PHP-FPM, which uses the FastCGI interface and has some very interesting properties.

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Scale Up

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HPC has a unique set of requirements that might not fit into standard clouds. However, plenty of commercial options, including cloud-like services, provide the advantages of real HPC without the capital expense of buying hardware.

Protective Shield

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Although SELinux is designed as a shield rather than a weapon, it still makes many admins wince. This is hard to understand, however, because operation is now uncomplicated, and SE adds enormous value in terms of the security of the entire system.

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