The latest versions of Ubuntu do not appear to have the tool udevinfo anymore, which is vital to find information about devices connected to the computer.

There is, however, a new tool called udevadm, and with a little syntax trick you can get it to spit out your familiar udevinfo syntax:

udevadm info -a -p `udevadm info -q path -n /dev/sdb`

shows:

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/pci0000:00/0000:00:13.2/usb2/2-1/2-1:1.0/host5/target5:0:0/5:0:0:0/block/sdb':
    KERNEL=="sdb"
    SUBSYSTEM=="block"
    DRIVER==""
    ATTR{range}=="16"
    ATTR{ext_range}=="256"
    ATTR{removable}=="1"
(...)

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""

If you use this more often and don’t like the idea of entering a huge line of code for such a simple command, drop the following into your .bashrc file (all in one line):

udevinfo () { udevadm info -a -p `udevadm info -q path -n "$1"`; }

Now (after starting a new session or typing source ~/.bashrc), a simple udevinfo /dev/sdb will do the trick.

Also helpful: A long time ago, I wrote a blog post about udev rules, showing what rules I used at the time to have consistent device names for my USB drives, no matter in what order I connect or disconnect them. The devices I mention there are long gone, but I keep going back to that post every time I need to write a new udev rule.

I am delighted to report that in the project I am currently working on, I get to play with a lot of smiley faces:

Hope that lightens up your day a little

(Yes, you guessed right: For every smiley page there is an equivalent with a frowny face, but sheesh, don’t tell anyone )

It’s the 30th anniversary of the arcade classic Pac-Man, one of my all-time favorite computer games.

Apparently, Google agrees, so they celebrate it with a playable (that’s right) Google logo: Today, Google is most certainly distracting more people from work than Facebook.

This is awesome. Make sure to try it out before the end of the day!

(If you missed it, I am confident it’ll show up in the Google’s doodle gallery soon.)

Update: Tobias and JP point out the Google’s Pacman logo now has a permanent residence on the web. Great!

When you look at the bottom of your GMail window, you’ll notice links in the footer, cycling through more or less helpful tips as well as Google advertisements.

For years now, one of these links has been to the GMail Notifier for Mac:

Sadly though, this link to http://mail.google.com/mail/help/notifier/index.html (forwards to http://toolbar.google.com/gmail-helper) has, also for a long, long time now, been a not found error. As you can’t open a bug report with Google, I’ve emailed the GMail service people about this before, but I guess dead links in production software are not on top of their todo list.

Ah well, maybe they google for “Gmail fail” sometimes and find the bug report this way

After Apple and Microsoft have (finally!) publicly announced they are ready to pull the plug on Adobe Flash, the first makers of Flash webapps are starting to ditch it in favor of HTML5: As Techcrunch writes, Scribd, an online document hosting service, will focus its efforts on HTML5 from now on.

Scribd co-founder and chief technology officer Jared Friedman tells [Techcrunch]: “We are scrapping three years of Flash development and betting the company on HTML5 because we believe HTML5 is a dramatically better reading experience than Flash. Now any document can become a Web page.”

I am very pleased to hear that. Now that web standards are finally offering the kind of versatility modern web applications need, it is a fantastic development that companies are getting rid of the monster that is Flash. That’s good for the user for so many reasons, and it’s a great example of what HTML5 can really do.

Update: Ryan points out in the comments that Scribd has a demo document online of what this is going to look like. It’s fantastic!

By the way: Another company I would like to see getting rid of Flash (in fact, I never understood why they used it in the first place) is slideshare. They are turning into a de-facto standard for posting presentation slides online, but as of yet, their main UI is solidly in Flash’s claws.

Everybody knows Mozilla makes Firefox. But there is a lot more software at work here at Mozilla that you might not be aware of. For example: What happens when you go to getfirefox.com and click on the download button?

By clicking on the button, you ask our servers to send you a specific file, for example: Firefox 3.6.3, for Windows, in German. On a small website, the server would just fetch the file and hand it to you. But if you need to handle millions of downloads a day like we do, a single server can’t handle it all by itself, so it gets more complicated. In order to provide you with downloads, updates, etc., as fast and conveniently as possible, Mozilla collaborates with a number of mirror providers that have volunteered to host Firefox and other downloads on our behalf, thus sharing the load of our numerous downloads between a number of servers all over the world.

For some years now, we have been running a bundle of software called “Bouncer” to handle our downloads for us.

Bouncer consists of of three components: The user-facing bounce script, an administrative interface called Tuxedo, and a mirror checker called Sentry.

First, the bounce script. It is the only component the “ordinary user” gets to interact with. It essentially does the following after you click on a download link:

• It determines if the product you asked for exists.
• Out of our list of mirrors, it picks one that has your file. Initially, it would pick one at random. Over the years, the logic has become more elaborate though: Meanwhile, it takes into account in what country you currently are, as well as how strong the mirrors are (stronger mirrors serve more downloads, weaker ones serve less).
• A split-second later, Bouncer refers you to the server it decided on, and that server will send you the file you asked for.

But wait, there is more! How does Bouncer know what products are available, for what operating systems, and in what languages? That’s where the admin interface comes in. We have a release engineering team who work hard every day to deliver the newest software versions to you in handy little packages. Previously, during every release, an engineer would manually tell Bouncer that a new version was available for download. But just last week, we improved this process by introducing a new interface to Bouncer, with a project called Tuxedo. The release engineering team can now, fully automatically, feed new versions into Bouncer at the time of release, with no manual intervention. With less time spent on repetitive tasks, we can spend more time making Firefox awesome.

Finally, the Sentry component is a script that periodically checks the health of our mirrors, and adjusts our settings accordingly. This is to ensure that a situation where you are forwarded to a mirror that is currently unavailable is very, very rare. So far, these mirror checks happen from Mozilla Headquarters, and therefore reflect the connectivity we get to the mirrors from here. In the future, we want to improve that by taking into account more how our users’ connectivity is to the specific mirrors (for the geeks out there: Network proximity != geographical proximity), which has the potential to result in faster download times, less expenses for mirror providers, and general happiness.

As you can see, there are a lot of things happening behind the scenes before Firefox makes its way onto your computer at home, and we are constantly working on improving the way we are doing things. Plus, as always: Bouncer is completely open source, and we have a public bug tracker, so if you notice any problems or see room for improvement, make sure to let us know.

Photo credit: “directions”, CC-by licensed by Phillie Casablanca.