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{ Category Archives } Linux

Linux news and information.

The Meaning of 'su'

When I taught for Guru Labs, part of the students training was covering different ways of becoming the root user, such as using "su", "sudo" and taking advantage of the wheel group. Login shells versus non-login shells were also covered. The idea was to help the student understand the real nature of the shell and […]

Keeping Time In Debian With Virtualbox

I've been encountering an interesting issue recently with Debian running as a guest in side of VirtualBox on Windows XP. When I initially installed Debian, I told it to adjust the hardware clock to UTC. Of course, this was the mistake I made. Windows operating systems want the hardware clock set to local time, then […]

Get Your Unix Beard On

Today is the day, my friends. The day where the boys are separated from the men. The day tech support is separated from the system administrators. The day God smiles from on High. What am I referring to? Why, Whiskerino 2009, of course. The concept is simple. Whiskerino is an Internet beard growing contest that […]

Scrubbing Hard Disk Data

I've recently had the opportunity with wiping 13 SCSI drives. The drives are small- 36 and 18 gigabyte drives, and they do contain sensitive data. They will be sent off to a third party for physical destruction, but we need to make sure that the data is completely overwritten on the disk in a secure […]

Mobile LVM

Today, as my wife and I were headed into Target, I thought of the cheap USB thumb drives they usually have on sale, and I was tempted to purchase some. Then I got to thinking: what if I could use those thumb drives as one disk, using LVM, and have the ability to take that […]

The Official Root Certified, LLC Launch!

Today is a big day. Christer Edwards and I have gone into business with each other starting a Linux and Unix company here in Utah. We're named "Root Certified, LLC". We specialize in Linux hosting, Linux and Unix consulting and auditing. You can find more about us at our page: http://rootcertified.com. If your company is […]

GnuPG Up And Close

Every GNU/Linux distribution ships with GnuPG by default. While they all don't ship with the same GUI frontend, they do ship with the the same CLI backend. So, we'll be interfacing with that throughout this informational session. I'm not presenting this as anything necessarily useful. Rather, I hope you find it informational/educational, and learn a […]

Password Policies Suck

I've been getting a flurry of emails at work, reminding me that my passwords are about to expire on several Unix and Linux machines in our production datacenter. They have a policy in place, where the password much be changed every 90 days, and I have to keep my current password for at least 7 […]

Ubuntu 9.04 Torrents

Tommorow is the Big Day for GNU/Linux, when Ubuntu goes through it's regularly 6 month upgrade. Ubuntu 9.04, codenamed "Jaunty Jackalope" is due for release. The consequence is, these servers will get slammed, meaning that's it's difficult for people who use other distributions on some mirrors to update their distribution. As a result, rather than […]

Spacewalk/RHN Satellite Registration Script

At work, we have an RHN satellite that is registered against RHN, and pulls down all the updates as necessary for the 32-bit and 64-bit RHEL servers that we have in our network. We currently have 34 RHEL servers in operation, with the expectation to grow past 40, all without virtualization. When we really start […]

Use The Tools

When I taught Linux system administrators, I would go through a series of rules, and rule #1 was always: Whenever you're editing config files, and a tool exists to make the change, use the tool instead of editing the config by hand. The logic is easy to follow. We as humans are capable of error. […]

Server Migration From Ubuntu 8.04 To Debian 5.0

Last night, I spent a few hours migrating this production server from Ubuntu 8.04 "Hardy Heron" to Debian 5.0 "Lenny". Many have asked me online and in person why I would make the switch, especially being a heavy Ubuntu advocate. I hope I can explain that in a clear manner in this post. But first, […]

Debian 5.0 "Lenny" Released

Debian released 5.0 codenamed "Lenny" last night, after just 1 month shy of two years since 4.0 "Etch" was released. I've been running it on my messaging server for nearly a year now, and it's great. I had one hiccup with the kernel not wanting to communicate with my HappyMeal ethernet cards, but a fix […]

Ubuntu Vs. Fedora Artwork

I've had this discussion a couple of times with some friends about which looks better: Ubuntu or Fedora. So, I decided to take a poll from my readers, and see what you think. Which vendor does a better job at artwork? I've provided screenshots of the default wallpaper for each release on both distributions. Now, […]

Operating Systems- A Baby Board Book

After about 4-5 hours last night, and early this morning, I finished creating a board book for my 15-month old daughter. Of course, what better topic to choose than that of operating systems? So, I settled with GNU/Linux, UNIX and other operating systems as the main categories for the book, and it turned out great! […]