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Here’s a nice Linux tool: checkrestart

Dave Farquhar security March 12, 2013March 24, 2023apache, debian, nessus, retina, SSH, ubuntu

Tom Gatermann told me about a nice tool for Debian (and presumably Ubuntu) called checkrestart. Sometimes, even though you did an apt-get update and apt-get upgrade to bring your system up to date, you can still be running the out-of-date version of something. That’s the problem checkrestart helps you solve.

Dave Farquhar

David Farquhar is a computer security professional, entrepreneur, and author. He has written professionally about computers since 1991, so he was writing about retro computers when they were still new. He has been working in IT professionally since 1994 and has specialized in vulnerability management since 2013. He holds Security+ and CISSP certifications. Today he blogs five times a week, mostly about retro computers and retro gaming covering the time period from 1975 to 2000.

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Another easy Apache tweak

Dave Farquhar Apache February 20, 2013February 19, 2013apache, debian, JPG, PNG

I ran my site through Google Page Speed on Tuesday, and scored a surprising 88 out of 100–higher than I expected. Getting above 90 is going to take some optimizations on files that WordPress updates may change, so I’m hesitant to do that, but one thing it told me to do was to cache more aggressively. That’s pretty easy, as it turns out, and I could definitely feel a difference afterward.

Here’s the trick. Read more

Dave Farquhar

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Use Apachebench to test your webserver optimizations

Dave Farquhar Apache February 14, 2013September 26, 2017apache, benchmark, debian, mysql, PHP, syntax

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. Read more

Dave Farquhar

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Making gradual improvements, starting with whatever bugs you the most

Dave Farquhar Uncategorized February 10, 2013November 30, 2018apache, home improvement, mysql, new hardware, spam, train layout

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 most. Then, when that’s done, cycle back, create another subproject that fixes whatever bugs you the most now, and keep making incremental improvements like that until you get where you want.

I’ve used the same trick on home improvement projects, and I applied it to this web site over the course of the last few weeks, doing a series of incremental improvements. It led places I didn’t expect it.
Read more

Dave Farquhar

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The benefits of doing IT at home, too

Dave Farquhar Hardware February 9, 2013November 30, 2018apache, apple, firewall, hp, MCSE, os x, unix, windows 7, Windows Server

Earlier this week, The Register touted the benefits of having a home lab.

That lab doesn’t necessarily have to be elaborate. But there is definitely something to be said for having some equipment that you can learn and experiment on, and that can break without the world ending. Read more

Dave Farquhar

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DROP DATABASE wordpress;

Dave Farquhar Apache, Linux, This weblog February 7, 2013apache, firewall, mysql, PHP, SQL

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 it running. Then I tried backing up and restoring files from my existing server, and the server didn’t like that one bit.

Dave Farquhar

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Tag your imported WordPress content with Simple Tags

Dave Farquhar Apache February 3, 2013February 2, 2013apache, mysql, SQL

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 in conjunction with a plugin like Similar Posts to display links to related content at the end of each post. And trust me, when you blog for a decade, a lot of your stuff is related.

It’s also sad how much of that old content becomes obsolete, but the 2% that stands the test of time and continues to get readers year over year is satisfying, too.

Here’s how to tag your old content–wherever it came from–quickly and easily.

Dave Farquhar

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Four simple steps to optimize WordPress

Dave Farquhar Apache, Linux February 1, 2013August 16, 2014apache, mysql, os x, spam, SQL, x86

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 hits per day, you need to tune it. If you want to get more than a few hundred hits per day, you need to tune it because Apache and MySQL’s default settings are by no means one-size-fits-all. And you can never have too much speed. There are two reasons for that: Google favors fast sites over slow sites, and Amazon found that a one-second delay in page load drops traffic by 7 percent.

There’s a lot of advice out there on tuning WordPress, some of which seems to be good, and some of it not so good.

Here are four things that I know work. I run Apache and MySQL under Linux; these tools may run under Windows or OS X too.
Read more

Dave Farquhar

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A minor (but vital) Apache performance tweak

Dave Farquhar Apache, Linux January 27, 2013April 15, 2017apache, mysql, perl script, PHP, spam, x86

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 problem, but one that’s easy to fix with a relatively simple Perl script.

Dave Farquhar

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