MySQLTuner

The first day of FUDCon 2011 in Tempe is coming to a close tonight and I'm completely exhausted. As promised, I'll try to summarize the day and cover the talks which I attended. The day started out with Jared Smith's "State of Fedora" address. The ... [More] audio has already been posted on the wiki, but the [...]FUDCon 2011: Day One is a post from: Major Hayden's Racker Hacker blog. c0b6ad7e-f251-11df-b20b-4040336e00ef [Less]

FUDCon 2011 in Tempe hasn't even fully started yet, but it's been well worth the trip already. We put quite a few names with faces (or IRC nicks with faces) and discussed our initial forays into Linux when we were young. From what I was told last ... [More] night, this is the first conference organized by [...]Gearing up for FUDCon 2011 is a post from: Major Hayden's Racker Hacker blog. c0b6ad7e-f251-11df-b20b-4040336e00ef [Less]

After reading the title of this post, you might wonder "Why would someone pay for a Mac Mini and then not use OS X with it?" Well, if you have a somewhat older Mac Mini you want to use as a server with Linux, these instructions will come in handy. To ... [More] get started, you'll need [...]Single boot Linux on an Intel Mac Mini is a post from: Major Hayden's Racker Hacker blog. c0b6ad7e-f251-11df-b20b-4040336e00ef [Less]

If you're a fan of icanhazip.com, you'll be excited to know that it now supports IPv4 and IPv6 addresses. The icanhazip.com domain now has A and AAAA records, so you should now be able to reach it on connections that are IPv6 only. Should you find ... [More] yourself in a situation in which you need to [...]icanhazip.com now supports both IPv4 and IPv6 addresses is a post from: Major Hayden's Racker Hacker blog. c0b6ad7e-f251-11df-b20b-4040336e00ef [Less]

E-mailing a binary e-mail attachment from a Linux server has always been difficult for me because I never found a reliable method to get it done. I've used uuencode to pipe data into mail on various systems but the attachment is often unreadable by ... [More] many e-mail clients. Someone finally showed me a simple, fool-proof method [...]Sending binary e-mail attachments from the command line with mutt is a post from: Major Hayden's Racker Hacker blog. c0b6ad7e-f251-11df-b20b-4040336e00ef [Less]

Although it's not a glamorous subject for system administrators, backups are necessary for any production environment. Those who run their systems without backups generally learn from their errors in a very painful way. However, the way you store ... [More] your backups may sometimes prove to be just as vital as the methods you use to backup [...]Strategies for storing backups is a post from: Major Hayden's Racker Hacker blog. c0b6ad7e-f251-11df-b20b-4040336e00ef [Less]

While I'm not the biggest proponent of certifications, I still think you can learn some valuable information while studying for some certification tests. A good example of that is Red Hat's System Monitoring and Performance Tuning Expertise Exam. ... [More] It's one test out of five in the Red Hat Certified Architect (RHCA) track of exams. I [...]One RHCA exam down, five to go is a post from: Major Hayden's Racker Hacker blog. c0b6ad7e-f251-11df-b20b-4040336e00ef [Less]

My daily work requires me to work with a lot of customer data and much of it involves IP address allocations. If you find that you need to sort a list by IP address with GNU sort on a Linux server, just use these handy arguments for sort: sort -n -t ... [More] . -k 1,1 -k [...]Using GNU sort to sort a list by IP address is a post from: Major Hayden's Racker Hacker blog. c0b6ad7e-f251-11df-b20b-4040336e00ef [Less]

This situation might not affect everyone, but it struck me today and left me scratching my head. Consider a situation where you need to clone one drive to another with dd or when a hard drive is failing badly and you use dd_rescue to salvage whatever ... [More] data you can. Let's say you cloned data from [...]Mounting a raw partition file made with dd or dd_rescue in Linux is a post from: Major Hayden's Racker Hacker blog.c0b6ad7e-f251-11df-b20b-4040336e00ef [Less]

It's not easy remembering which RPM packages contain certain files. If I asked you which files you'd find in packages like postfix-2.7.1-1.fc14 and bash-4.1.7-3.fc14, you would be able to name some obvious executables. However, would you be able to ... [More] do the same if I mentioned a package like util-linux-ng-2.18-4.6.fc14? If the RPM is already installed, [...]Locate RPM packages which contain a certain file is a post from: Major Hayden's Racker Hacker blog.c0b6ad7e-f251-11df-b20b-4040336e00ef [Less]