mysql Archives - The Silicon Underground David L. Farquhar on technology old and new, computer security, and more Tue, 04 Nov 2025 00:58:41 +0000 en-US hourly 1 https://kerosin.digital/rss-chimp16321610 Resources for learning SQL https://dfarq.homeip.net/resources-for-learning-sql/?utm_source=rss&utm_medium=rss&utm_campaign=resources-for-learning-sql Wed, 30 Sep 2015 11:00:32 +0000 https://dfarq.homeip.net/?p=7875 Whether you’re a sysadmin, an analyst, or use a computer for something else professionally–even if you’re not a database administrator or developer–SQL is a useful skill to know. I’ve gotten by for 20 years without knowing much more SQL other

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]]> 7875 Security flaws in security tools are all too common https://dfarq.homeip.net/security-flaws-in-security-tools-are-all-too-common/?utm_source=rss&utm_medium=rss&utm_campaign=security-flaws-in-security-tools-are-all-too-common Mon, 14 Sep 2015 11:00:14 +0000 https://dfarq.homeip.net/?p=7862 Fireeye runs a bunch of its processes as root, a practice that’s been a no-no since the late 1990s, and they’re more interested in litigation than they are in working with the guy who discovered it. The attitude is all

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]]> 7862 A meeting secret weapon: the potato https://dfarq.homeip.net/a-meeting-secret-weapon-the-potato/?utm_source=rss&utm_medium=rss&utm_campaign=a-meeting-secret-weapon-the-potato Tue, 10 Dec 2013 11:00:59 +0000 https://dfarq.homeip.net/?p=6956 One of the security podcasts I listen to–I’m not sure which one, but this sure sounds like Liquid Matrix–gave some advice the other week about meetings: Bring a raw potato. With any luck, you won’t need it. But if the

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]]> 6956 Use Apachebench to test your webserver optimizations https://dfarq.homeip.net/use-apachebench-to-test-your-webserver-optimizations/?utm_source=rss&utm_medium=rss&utm_campaign=use-apachebench-to-test-your-webserver-optimizations Thu, 14 Feb 2013 10:18:05 +0000 https://dfarq.homeip.net/?p=6338 If your web server is slow and you want to fix it, it’s nice to be able to quantify what you got. Enter Apachebench, which is part of Apache and probably already on your server. The Apachebench caveat Usage is

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]]> 6338 Making gradual improvements, starting with whatever bugs you the most https://dfarq.homeip.net/making-gradual-improvements-starting-with-whatever-bugs-you-the-most/?utm_source=rss&utm_medium=rss&utm_campaign=making-gradual-improvements-starting-with-whatever-bugs-you-the-most Sun, 10 Feb 2013 10:52:00 +0000 https://dfarq.homeip.net/?p=6343 A long project can be paralyzing at times, making it hard to figure out where to start. A trick that I learned in model railroading is to just work on whatever small percentage of the project that bothers you the

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]]> 6343 DROP DATABASE wordpress; https://dfarq.homeip.net/drop-database-wordpress/?utm_source=rss&utm_medium=rss&utm_campaign=drop-database-wordpress Thu, 07 Feb 2013 23:55:02 +0000 https://dfarq.homeip.net/?p=6331 This week, I doubled back down in earnest to get my webserver running on the hardware I bought a year ago. After  getting Apache, PHP and MySQL installed on the box and playing together nice, I installed WordPress and got

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]]> 6331 Tag your imported WordPress content with Simple Tags https://dfarq.homeip.net/tag-your-imported-wordpress-content-with-simple-tags/?utm_source=rss&utm_medium=rss&utm_campaign=tag-your-imported-wordpress-content-with-simple-tags Sun, 03 Feb 2013 11:27:49 +0000 https://dfarq.homeip.net/?p=6315 Unlike many bloggers, I blogged for a decade before moving to WordPress. That meant I had a pile of old posts with no tags on them. One of the nice things about WordPress is that you can use the tags

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]]> 6315 Four simple steps to optimize WordPress https://dfarq.homeip.net/four-simple-steps-to-optimize-wordpress/?utm_source=rss&utm_medium=rss&utm_campaign=four-simple-steps-to-optimize-wordpress Fri, 01 Feb 2013 10:02:19 +0000 https://dfarq.homeip.net/?p=6308 A couple of years ago, I stood up a WordPress server. I made no effort to tune it, let alone turbocharge it, which is a decision I later came to regret. If your site gets more than a few hundred

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]]> 6308 A minor (but vital) Apache performance tweak https://dfarq.homeip.net/a-minor-but-vital-apache-performance-tweak/?utm_source=rss&utm_medium=rss&utm_campaign=a-minor-but-vital-apache-performance-tweak Sun, 27 Jan 2013 15:57:54 +0000 https://dfarq.homeip.net/?p=6295 My problems seem to have become more rare since I started blocking spambots and tuned PHP and Apache but last night my server ran out of memory again and started timing out. It turns out I still had a critical

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]]> 6295 Cutting Apache preforks seems to help small web servers https://dfarq.homeip.net/cutting-apache-preforks-seems-to-help-small-web-servers/?utm_source=rss&utm_medium=rss&utm_campaign=cutting-apache-preforks-seems-to-help-small-web-servers Fri, 30 Nov 2012 11:05:41 +0000 https://dfarq.homeip.net/?p=6103 I’ve had a ton of downtime this week (this seems to be the busy time of year for my web server), but I think I traced the problem to a known issue. My server has a 1.5 GHz single-core CPU

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