Why GNU su does not support the “wheel” group

13 September 2007 – 7:46 pm by wg

GNU[Insert IMHO disclaimer] This is quite possibly the worst reason for doing anything, ever:

(From the GNU su man page)

22.5.1 Why GNU su does not support the “wheel” group

(This section is by Richard Stallman.)

Sometimes a few of the users try to hold total power over all the rest. For example, in 1984, a few users at the MIT AI lab decided to seize power by changing the operator password on the Twenex system and keeping it secret from everyone else. (I was able to thwart this coup and give power back to the users by patching the kernel, but I wouldn’t know how to do that in Unix.)

However, occasionally the rulers do tell someone. Under the usual su mechanism, once someone learns the root password who sympathizes with the ordinary users, he or she can tell the rest. The “wheel group” feature would make this impossible, and thus cement the power of the rulers.

I’m on the side of the masses, not that of the rulers. If you are used to supporting the bosses and sysadmins in whatever they do, you might find this idea strange at first.

Argh.

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Cyclic permutations

9 September 2007 – 5:09 pm by wg

Take the number 142,857. Multiply it by 2, 3, 4, 5, 6, and 7, as follows:

142,857 * 1
142,857 * 2
142,857 * 3
142,857 * 4
142,857 * 5
142,857 * 6
142,857 * 7

Well I thought it was neat anyway :)

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Holidays and traffic trends

6 September 2007 – 11:27 pm by wg

I’ve always found Internet traffic trends fascinating, especially when they’re out of the “ordinary”. One of the main sites I look after has a peak on Monday-Tuesday followed by a 50% reduction in traffic over the weekend. This changes when one of two events occur — a Holiday/three-day-weekend, and over Christmas-New Year. Christmas/New Year is something I’ll post about at that time but recently (last week) I observed a US Monday Holiday in my traffic charts:

Traffic Graph

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Dictionary domain names

5 September 2007 – 10:08 am by wg

I just stumbled across http://attainable.ws/, a web site which allows you to search for “dictionary word” domain names available for registration, which I think is a pretty neat tool. Someone needs to marry this with a thesaurus and it will be all-powerful!

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Pidgin 2.1.1 on Ubuntu Feisty

4 September 2007 – 1:32 pm by wg

I’m not sure exactly why but it appears that Ubuntu hasn’t yet included Pidgin (formerly GAIM) in their package repository just yet. I have been running Pidgin for a while on Ubuntu (version 2.0, installed from a .deb I found floating around online) but I’ve been itching to upgrade for a while.

Today I came across the Debuntu repository (not affiliated with Ubuntu or myself) which has packages for Pidgin 2.1.1, and some other software.

Here is how I got Pidgin 2.1.1 installed on my Feisty Fawn Ubuntu machine:

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Burning and ripping ISO images in Windows

25 August 2007 – 11:48 pm by wg

Tonight I came across an extremely useful “unofficial powertoy” for Windows for creating ISO images from CD’s, and burning ISO images from Explorer shell. It’s called (funnily enough) ISO Recorder and is available for Windows XP, 2003, and Vista. I’ve always been quite surprised that Windows doesn’t just have this functionality (I’ve been spoiled by Gnome, etc), but I guess most Windows users wouldn’t have much use for it.

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More blogs added to Planet SysAdmin - 25 August 2007

25 August 2007 – 7:07 pm by wg

I have added the following SysAdmin Blogs to Planet SysAdmin in the last week or so:

Thanks for all the recommendations. Please let me know if you know of any other sysadmin related blogs that should be here!

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Adobe Acrobat Reader and Firefox plugin on Ubuntu Feisty

25 August 2007 – 5:48 pm by wg

After the death of the hard disk in my laptop this week, I thought I would use it as an opportunity to upgrade my laptop to the latest Ubuntu release, Feisty. I’ve always found Gnome a bit sluggish on my 1.2GHz “sub-notebook” Samsung Q30, so this time I opted to install Xubuntu (with XFCE instead of Gnome) and so far I am very impressed, but that’s another story for another day!

One of the first things I noticed setting up the system was that the acroread package is no longer available! Now, I realise that there are “perfectly good” non-Adobe readers for PDF files, but in reality they’re not “perfect”. I often have problems with Evince/xpdf etc printing PDF’s correctly, and just as often with just rendering them on the screen.

Some quick research on Google and I discovered an alternative package repository called “Medibuntu”, in their words — Medibuntu (Multimedia, Entertainment & Distractions In Ubuntu) is a repository of packages that cannot be included into the Ubuntu distribution for legal reasons (copyright, license, patent, etc). And they have the Acrobat Reader package! Here are the steps I took to get Acrobat Reader and the Firefox plugin installed on my Ubuntu Feisty machine:

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