2011 Posts

Using GoDaddy as my registrar is one of those things I’ve always felt vaguely ashamed of. Something I knew all the “cool kids” didn’t do, but I was already so neck-deep in them that I didn’t want to transfer. Not to mention I had my DNS hosted with them as well so the thought of going through all that trouble to move just seemed like too much of a hassle to deal with without good reason. In my last entry, I talked about setting up your own DNS server. This was the first part of my attack on moving my domains away from GoDaddy. But I didn’t have a real timeline to move away from them. Then came the news of GoDaddy’s support for SOPA - one of the worst attacks on the Internet since 1996’s Communications Decency Act. Now, to be sure, GoDaddy’s position on SOPA was not the first thing they’ve done to anger me. Their overtly misogynistic advertising has always bothered me, and their CEO Bob Parsons’ elephant killing and shameless exploitation of the natives angered me so badly that I almost left in April. But their aggressive support of SOPA was the final straw for me. I’d been a customer since 2003, but I simply could not take it anymore. So over the course of about 4 days, I transferred all my domains to Namecheap. Having never transferred a domain before, the process was surprisingly quick and easy. Once again, it makes me wonder why I haven’t done it sooner.

I’m a developer, first and foremost. I like writing code. To me, maintaining servers, configuring things, troubleshooting network issues and the like -  these are things I do to support my primary interest and job as a developer. I’m not ignorant of these things, but all things considered they’re not my favorite things to do. One thing I will admit I’ve been ignorant over the years is DNS. Oh sure, I know at a high level how it works. I even know a bit about the different record types. I knew enough to have my own domain name, configured using Godaddy’s DNS servers to point to my server. But actually running my own name server? Something I’ve never done and, for some reason, had this unnatural fear of. Well, no more. I’m now running my very own shiny new name server and, actually, it wasn’t really as difficult as I thought. And because this was a learning experience for me, I figured I’d walk you through what I did as well. Picking  a Server There are two big players in the “DNS Server software” space: BIND and djbdns. BIND is the 900 pound gorilla that has been around forever and ever, and is insanely difficult to configure. djbdns is from the same guy who wrote qmail - I’ll let you be the judge of that. But after researching and actually attempting to install both of these, I eventually gave up. Both just came across as being too complex for a simple name server handling a couple of domains, and the documentation for both was equally complex. That’s when someone on Twitter pointed me to MaraDNS. I looked it over and was surprised to find good, readable and simple documentation that made it look easy to install. So I decided to give it a whirl. Here’s what I did. Note that this install is for a Gentoo system. Yours will be different if you’re using something else. Installing and Configuring MaraDNS First step is to install it. emerge maradns And let Portage do its thing. Once it’s installed, you really only have to worry about a few files. In /etc/mararc, you need to check to be sure you’re binding to the right interfaces. In my config, I bound it to the loopback and to the main interface: ipv4_bind_addresses = "x.x.x.x, 127.0.0." After that, you tell it to be authoritative, and what domains you are wanting to serve records for. csv2 = {} csv2["rebeccapeck.org."] = "zones/rebeccapeck.org" Note the period at the end of the domain name - it’s important. Each entry in the csv2 array should map to a zone file. I put mine in the “zones” subdirectory (which, in Gentoo, lives under /etc/maradns). mkdir -p /etc/maradns/zones Then, with your favorite editor (which should be vi :P), you create your zone file. The one for rebeccapeck.org (partially) looks like this: rebeccapeck.org. NS ns1.epsilonthree.com. rebeccapeck.org. NS ns2.epsilonthree.com. rebeccapeck.org. +3600 A x.x.x.x rebeccapeck.org. +3600 MX 0 rebeccapeck.org. www.rebeccapeck.org. +3600 CNAME rebeccapeck.org. So what are we doing here? Well, here it helps to know something about the different types of DNS records. I’m not going to cover all the different types of records - this is a good list of common ones and Wikipedia has a full list. The important ones you need to know are NS (Name Server), A (the main record), MX (mail server records), and CNAME (alias). The “+3600” is setting a timeout on the records to one hour (3,600 seconds). By default, the server will send one day (86,400 seconds). Here, I’m telling the server what the name servers are (strictly speaking, this isn’t required, but I added it all the same) and that the main address for people requesting “rebeccapeck.org” is this IP address. I’m also saying that people who request “www.rebeccapeck.org” should get the IP address for “rebeccapeck.org.” I also add an MX record that points to rebeccapeck.org with 0 as the priority (the first (and only) server). That’s it! Restart MaraDNS: /etc/init.d/maradns restart And you can test it out. dig @localhost rebeccapeck.org A You should get a big long printout, but what you want to see is these two lines: QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 0 rebeccapeck.org. 3600 IN A x.x.x.x Assuming the above is the correct address, congratulations, your DNS server is now resolving properly locally. Delegating your Domain The next step is delegating your domain to your own server. I’m not going to cover this in too much detail because how it happens depends on the registrar. In general, this is a two step process: Register your name server’s IP address to a name. At NameCheap, when you’re in the domain screen this is done under Advanced Options > Nameserver Registration. Under GoDaddy, this is under the “Hosts” section of the domain information screen. You need to add at least two “nsX.domain.com” entries, but they can both point to the same IP. Delegate your domain to the names you just created. At NameCheap, you would go General > Domain Name Server setup, and Specify Custom DNS Servers. Then, enter the two (or more) names you just created “nsX.domain.com”. I can’t remember how I did this in GoDaddy, but I remember it was pretty apparent. That’s it! They say it takes 24-48 hours, but I started seeing requests hit the new name server within about an hour. Of course, since I wasn’t actually changing IP addresses, there was no real downtime. As of now, all my domains are being served off my own nameserver. It’s kind of a neat feeling of accomplishment, knowing you’re not relying on someone else’s DNS setup - they’re just providing you a name. This makes domain transferring much easier and adding new records much easier. And seeing as how I’m currently in the process of transferring all my domains away from GoDaddy, this will ease the transition.

Dear Eclipse, We’ve known each other a long time, haven’t we? I remember when we first met. It was way back in 2005, two jobs ago when I was working at interactive Point of View. I was still a young, naive kid, just out of college. At the time I was just getting my start writing serious PHP code, and you were a breath of fresh air compared to what I had been using before (Dreamweaver). You seduced me with your awesome power and functionality. I used to love being able to have code on top and a browser window underneath. Ironically enough, one of my favorite features would eventually be something I couldn’t care the slightest about. Later that year I would move on to Asteria, and I took you with me. This was the first time I had two monitors on my desk, and I kept Eclipse in one, and a browser in the other while programming. Again, your raw power made complex tasks easy. I discovered Subversion integration, which made Tortoise (I was still on Windows at the time) irrelevant to me. Your Subversion tools turned me into a huge fan. When I moved jobs again, to dealnews, I again took you with me. Much to the chagrin of my coworkers, I preached the gospel of Eclipse. When I first started I was still in the Windows environment and my setup was much like it was at Asteria. Later that year when I switched to Mac, I again took you with me. You occupied a place of honor in my dock. We upgraded together. Through Callisto, Europa, Ganymede, Galileo, Helios and Indigo. We upgraded through Leopard, Snow Leopard and Lion together. Sure, we had our occasional disagreements and outright fights. I remember one time when you would absolutely choke on the size of dealnews’ code tree. I would try other editors and IDEs. I tried jEdit, Coda and TextMate. But I always came back to you. But all things change, and this time I think we’re finally through together. The first sign you were no longer interested in me was the dropping of the official PHP build - the one I had been using for years. But you knew I was worried - you even said so on your website and pointed me to PDT - PHP Development Tools. This aphrodisiac, you told me, would make our relationship just like we were kids again. But what you didn’t tell me was that PDT would make you crazy and unstable in the worst kind of way. Your behavior has become increasingly erratic whenever you take PDT. You developed bugs, including ones that I could no longer justify. Ones that were literally costing me time every day. You said PDT could auto-complete code and when it does it works great. But when it doesn’t, the display glitches up the file so badly that the only way to get back into a usable state is to close the file and reopen. Now imagine doing this four or five times for every file you’re editing, every time you try to auto-complete some HTML. Your ill tempered behavior is costing me time and money. I tried to talk with you about it, but all you could say was NullPointerException. So, I’ve thought a lot about this. It’s been a good six year run, but I think it’s time we ended our relationship together. The truth is that I know about your other boyfriend, too. I know his name is Android, and I know you guys have been spending a lot of time together. And I’m okay with it. Really. All things change and we all have to adapt. The truth is I’ve been fooling around some with your cousin Netbeans, and I think we’re really hitting it off. In many ways, she reminds me of you. The difference is, Netbeans has herself together, is trying hard to improve herself and hasn’t forgotten who her friends are, instead of getting strung out on PDT and spending all her time hanging out in the backseat of Android’s Pinto. So goodbye, Eclipse. What we had was wonderful while it lasted and I’ll always treasure our time together and the memories we made. I hope your new life works out. Maybe we’ll see each other from time to time, but I honestly I don’t think that would be fair to Netbeans. She’s my new IDE now. -Rebecca Peck Eclipse User, 2005-2011

Revolutions are a dirty business in every country they occur in. Libya is no exception. Moammar Gadhafi was a terrible human being. He was a thorn in the side of 5 US Presidents. He actually did pursue a WMD program, only giving it up in 2006. Under him, Libya was a state sponsor of terrorism and was behind the destruction of Pan Am flight 103. At home, he brutally repressed his population and ruled with an iron fist. In short, he was not a nice person. According to a report on the BBC that I was listening to on the drive home, he was found hiding in a drain pipe in Sirte. He begged for his life, and was shot in the abdomen and again in the leg. Supposedly he “died” en route to a hospital, but at least one report mentioned an execution-style shot to the head. Now, is this what happened? There’s no way to know, and I suspect we never will for sure. And yet, I find myself having some difficulty taking any “joy” in his death, especially a death such as that. No man who begs for his life should be killed, especially without due process. I would much rather have seen him turned over to ICJ authorities and tried for crimes against humanity. And yet, it may have been the best possible outcome. Libya is not a stable country at this time and probably lacks the facilities to hold Gadhafi securely. There would be months of negotiations that would have to happen before he even got to a trial. All that time, his continued defiant existence would continue to empower his dwindling base. With him out of the picture, the rebels / new government should have little problem establishing itself as the new legitimate government of Libya, thus drawing a close to this whole thing even faster. Revolutions are a dirty business.

Unlike Steve Jobs, unless you’re in the tech industry, there’s a pretty fair chance you’ve never heard of Dennis Ritchie.

Normally, I’m not one to be too taken with the death of a “celebrity” … … but this one hurts. We truly lost a titan of our generation. A man who became synonymous with the company he founded, and whose products made life more awesome for millions of people. As I look around my house, pretty much every room has some touch of Apple, and all of that thanks to Steve. Rest in Peace, Steve Jobs. The world was enriched by your presence and is saddened with your loss. Thank you for everything you did.

I’m aware that the Mac oil price widget has quit functioning, and I’m aware of the cause as well. I’m working towards a more robust solution and should have something in the next week or so.

So with the landing of Atlantis, the end of the Space Shuttle program has finally come. And while it is bittersweet - I remember being able to watch the shuttle go up from my backyard (literally!) when we lived in Florida - you have to excuse me for slaughtering the sacred Huntsville cow. The retirement of the Space Shuttle is long overdue.

Because there doesn’t seem to be a good, simple way to track oil prices on the Mac dashboard anymore since the previous widget I used quit working, I whipped up a quick little widget that allows me to monitor the price of Crude Oil on the New York Mercantile Exchange. You can download it over on its own page.

PHP’s filter functions are really, really great. I’ve started using them almost any time I need to get input from a user and, personally, I don’t think you should use the old $_GET, $_POST unless you know what you are doing and there is some specific thing you’re trying to accomplish that you can’t with filter. Filter forces you to think carefully about what inputs your script takes and what format it takes them in. But there are also some behaviors of filter that can bite you in the rear if you aren’t really careful. One of these is knowing which flags you need to pass and what the difference between validation and sanitizing, when is the right time to  use each, and what flags to use. I ran into a good example of this today where I messed it up. I had configured filter_input_array to pull in a variable as FILTER_VALIDATE_FLOAT, probably because I wasn’t thinking like a user and instead was thinking like a developer. I’m the type of person that, when a form wants to know my phone number, I only enter 10 digits without parentheses or dashes. But users are different. They like friendly things. In this case, the user was entering “16,473.54” and the like into that box. Now, I can look at that and say, “yeah, that’s a float” (actually, it’s currency). It should be considered a valid value. But FILTER_VALIDATE_FLOAT will throw this out because it has a comma in it, unless you pass FILTER_FLAG_ALLOW_THOUSAND. Then, and only then, does it return the above as a valid value (in this case “16473.54”). But I looked at the code again. In this case, the value doesn’t need to be there except in a specific case, which I handled in error checking in the code, so I switched it to a Sanitize value instead. It’s probably a good idea to only use  FILTER_VALIDATE_* functions when your user has to give you a valid value and your script would fail if that wasn’t the case. If a validation returns false, you should fail the process and return a (nice) error message to the user. Sanitize functions allow you to accept a little wider range of data and still return a valid value from it. The docs have a great example of this involving email addresses. So if you’re writing PHP these days, definitely use filter. Just be careful and mind the flags and the difference between validation and sanitizing.

I’ve finally put together a website for dystill: www.dystill.org I’ll continue to post updates about this project here, though. I’ve also finished working on a plugin for Roundcube (the popular open-source webmail client). It can be found for download at the address above.

Version (do those really matter anymore? :P) 0.2 of dystill has been released. This version brings a significant change to dystill. Namely, it breaks the unofficial association between dystill and Postfix that has existed since I first wrote it last year. I did this for a couple of reasons: To hopefully increase adoption. Dystill now (really!) stands independent of any MTA. Use it with whatever you want (sendmail, Qmail, etc). You actually always could, but you’d have to ape some Postfix tables. You don’t have to do that anymore. To make it easier to write web-based front-ends to dystill’s MySQL database, enabling users to add rules. This was done by adding an “email” column to the filters table, updating that field with the recipient address, and dropping the old user_id field. Also, a “maildir_path” config variable was added to the config, specifying where the maildirs live. There was also a minor bugfix I came across the other day where certain uncommon (but legal) characters could result in unreadable maildirs.

The recent announcement by Linus Torvalds that the next release of Linux will be 3.0 has provoked rather furious discussion around the Internets about whether or not the incrementing of the version number is warranted. Linus himself has said that “absolutely nothing” has changed. “It will get released close enough to the 20-year mark, which is excuse enough for me, although honestly, the real reason is just that I can no longer comfortably count as high as 40.” This got me to thinking about the nature of version numbers. Once upon a time (when versions were driven more by engineers and convention, and less by marketing), a version number meant something. Major, minor, revision. A major new release that modified significant portions of the code from the previous release incremented a major version number. Version numbers less than 0 were beta releases. Linux has been at 2.x since 1996, and at 2.6.x since 2003. Mac OS has been at 10.x since 2001 (even though the current version of OS X is significantly different from the original release in 2001). Meanwhile, Google Chrome has blasted through major 11 “versions” in three years. Mozilla is planning to release versions 5, 6, and 7 of Firefox this year. You can’t tell me that they are going to change major parts of Firefox three times this year. In this case, version numbers are purely being driven by marketing. They need to “catch up” to Chrome and Internet Explorer. But we live in a different world now. One where, arguably, version numbers are becoming less and less important. The growth of “app stores,” I think, is desensitizing your average user to a version number. While apps in the app store still have versions, I couldn’t tell you what “version” any of the apps on my iPhone are (other than the OS), and I bet you can’t either. Any of the apps I’ve installed from the Mac App Store I could not tell you the version of them. I just know that, when I see the number on the icon, I know I need to do updates. The updates happen, and I get a new version with whatever new features are there (or, in the case of the Twitter app, whatever features have been removed). Then there are web apps which are versionless. What version of Gmail do you use? You don’t. You use Gmail. Sure, there’s probably a revision number or something in the background, but the user has no clue what version they’re using. And they don’t need to, because there’s no action they need to take. So version are numbered in a wide variety of ways depending on the product and overall seem to be becoming less important as the growth of broadband, “app stores,” web apps, and automatic updates make thinking about version numbers less important. So why does it matter if Linus ups Linux to 3.0? Ultimately, it’s just a number.

So I came across an interesting quirk in MySQL the other day. Let’s say you have a table schema and some values that look like this: +-------------------+------------------+------+-----+---------+-------+ | Field             | Type             | Null | Key | Default | Extra | +-------------------+------------------+------+-----+---------+-------+ | page_id       | varchar(30)      | YES  |     | NULL    |       | | clicks            | int(10) unsigned | YES  |     | NULL    |       | +-------------------+------------------+------+-----+---------+-------+ +---------+--------+ | page_id | clicks | +---------+--------+ | 1 | NULL | +---------+--------+ And then let’s say you pass the following SQL statement to MySQL: update page_click_count set clicks = clicks + 1 where page_id=1; If you come from a loosely-typed language such as PHP, you would probably expect clicks for page_id 1 to now be 1. But that’s not the case in MySQL. After the query is run, the table will still look like this: +---------+--------+ | page_id | clicks | +---------+--------+ | 1 | NULL | +---------+--------+ Not only does the query fail, but it fails with no warnings given. It appears that mathematical operations on null values silently fail. There are a couple of ways around this. The first and most obvious is to set NOT NULL and a default value on the column. In the example above, this would work. The NULL value in that field becomes a 0 and you can to normal mathematical operations on it. But what happens if, for whatever reason, you can’t do that? We actually have this situation in a few places at dealnews, where NULL represents a distinct value of that field that is different from 0. In this case, you can use COALESCE() to fill in the appropriate value for the field. update page_click_count set clicks = coalesce(clicks, 0) + 1 where page_id=1; Edit: Brian Moon informs me that this is actually part of the SQL specification. So hooray for specifications. Still, it’s kind of arcane; in working with MySQL (and PHP) for a decade now, this is the first time I’ve ever actually encountered this. Hopefully this helps someone who was as confused as I was.

I’m looking out my window right now at my neighbors. They have their kitchen lights on. Inside my house we have light - plenty enough light to light the whole room. And yet I still find it difficult to wrap my head around what just happened.

Over the years, I’ve seen a number of blog posts relating to common questions that should be asked of programmers. Obviously, this is going to depend on exactly what position you are hiring for, but there are some good “gateway” questions that can be used to determine whether or not an applicant you are interviewing can … well … even program at all. If they even have the mindset that makes a good developer. A common one I’ve seen tossed around is Fizz Buzz. The challenge goes something like this: Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”. Now, to anyone who even has a basic understanding of programming, this is super simple to solve using a modulus operator. But apparently many people applying for even entry-level development jobs cannot solve this problem. According to the article linked above, even one “senior developer” took 15 minutes to solve this problem. Earlier today, a friend posted something on Facebook that inspired what I think it another good, intermediate to difficult level programming question that also looks for pattern recognition. The relevant part of the post began by stating: “This year July has 5 Fridays 5 Saturdays and 5 Sundays.” There is the question! It would go something like this: The month of July 2011 has 5 Fridays, 5 Saturdays and 5 Sundays. Calculate the next 50 times there will be a month that has 5 Fridays, 5 Saturdays and 5 Sundays. Woah, so how to go about solving this problem? Well, look at a picture of July 2011. Notice something interesting about this month in relation to the question? This month has 31 days (the most any month can have), begins on a Friday and ends on a Sunday. And that’s the solution! It’s any month with 31 days that begins on a Friday! With this in mind, it’s pretty easy to come up with a PHP solution: <?php $count = 0; $num_found = array(); while(count($num_found) < 50) { $count++; $ts = strtotime("$count months"); if(date("t", $ts) == 31 && date("N", strtotime(date("Y-m-01", $ts))) == 5) { $num_found[] = date("F Y", $ts); } } print_r($num_found); ?> Note that I make use of PHP’s strtotime function, because it is the Swiss Army Knife of date manipulation in PHP. This would need to be adapted for use in another language. So now tell me: what are some other questions you’ve been asked or asked in an interview?

So today, out of nowhere, Xcode 4 finally landed as an official release. After seemingly forever in beta, and me quipping more than once about it’s similarity to Duke Nukem Forever, Apple finally pulled the trigger and released it. But something changed. Xcode now has a price. And that has left me, as both a Mac user and a Mac developer, with a lot of questions. It’s either $4.99 if you’re not a registered, paid Apple developer, or free if you are a registered, paid Apple developer (with all its $99 per year price tag glory). Supposedly there’s some crazy accounting reason that they have to charge for it. This, of course, leaves open the possibility that Xcode will soon be free again once OS X 10.7 arrives. But, it also leaves open the possibility that Xcode will no longer be distributed with OS X and will always have a price tag. It may not even stay $4.99. It may be $49.99 or $499.99. There are additional questions, too. Does this mean that Apple is still distributing Xcode as a bundle with GNU GCC? Because there are things (such as MacPorts) that rely on the underlying foundation provided by the developer bundle that don’t actually use Xcode. Before, those were completely free. Now, they cost $4.99 unless they have split the underlying compiler from the IDE. And if they are still distributing it with GCC, that leads to all kinds of crazy interesting licensing questions. But I think the worst part is that there is now a barrier to entry, however low, to being a developer on a platform that is already a minority in market share. I can’t understand how Apple potentially believes that it is good and right to trade short term profits for long term growth in the number of potential developers. For the future of the Mac platform, I sure hope this isn’t their line of reasoning. So, let me tell you a little story. My first dabbling in programming came courtesy of QuickBASIC back in the MS-DOS and Windows 3.1 days. This was the late 80s or early 90s, so I would have been 10 or 11 at the time. I stumbled across the Qbasic environment included with MS-DOS by accident and found Nibbles. And, after playing it, I discovered that I could change things by making changes to the strange text presented on the screen. I could change colors and speeds. But it would be a couple of years before I really understood what I was doing. When Windows 95 came out (and along with it, Visual Basic 4), I talked my parents into getting me a copy. I don’t remember how much it cost but it was probably a lot because it was one of the few Christmas presents I got that year. But boy did I run with it. I’ve periodically felt guilty over that expense because I didn’t actually make anything really useful with it, but it was instrumental in furthering my education. Now I could do things on my computer far beyond what poor ol’ Qbasic was capable of. So I wrote lots of silly little programs. I put together a “family newsletter” one year that was installed and ran as a piece of software. I was pretty proud of that. I even wrote some software for my high school as part of a software development and AP Computer Science courses. Eventually, I would move on to other things. Other versions of Visual Basic, Java, C, a brief foray into LISP and Forth-based languages for programming MUDs, and eventually web programming. First in Perl, then in PHP. I even landed my first paying programming job while still in high school, writing applications for a local transit contractor. At first, these were Visual Basic applications. But by the time I left (August of 2000) everything was going to the web and so were we. But I can trace everything - my entire career, and my consuming passion for software engineering - back to Qbasic and Nibbles. A silly little game about a block snake, and a free development environment included with the operating system. Had I not stumbled on Qbasic and Nibbles, there’s a chance I would never have been a developer. This is not about $4.99. I spend more on coffee in a week than that. My worry is about that 11 year old kid out there somewhere who may never get the opportunity to stumble across Xcode or the sample applications in /Developer and realize the raw power they possess. This is an area where Apple, a company with billions in cash on hand, should be happy to show a loss. It would be to the benefit of their platform, both now and in the future. One of the great benefits of the Mac platform has been it’s low barriers of entry to developers. Sure, one could argue that the hardware is more expensive (and I could counter-argue that, for the quality of the equipment you are getting a bargain), but the development tools have always been freely available online and included with the machine. You could dabble in programming to your heart’s content. Sure, if you want to put something in the app store(s), you had to pay for admission, but there was nothing stopping you from getting all the way to that point, or even distributing your creations on your own. But this new trend of charging for the development tools - even if it is a paltry sum - sends, to me, a worrying signal about the course Apple intends to tread. They’ve now moved the gate from the last step to the first step. It’s a course that Microsoft, as above, once tread. Microsoft? They now give away a version of Visual Studio for free.

In some ways, after years of doing programming and scripting, I’m now sort of rediscovering the power of the shell. Tonight, I was working on my server and remembered that I needed to start backing up my MySQL databases (which you do also … right?). So instead of writing a script to do that, with a little research, I was able to come up with a way to: Dump each database to a separate SQL file, with a timestamp. bzip the file. Keep 5 days worth of backups for each database, rotating the oldest backup off. Here’s what I came up with: cd /backup/mysql; for i in $(mysql -BNe 'show databases' -u root -p<password>); do mysqldump -u root -p<password> $i | bzip2 > $i-`date +"%Y%m%d"`.sql.bz2; rm -rf $i-`date -d "-5 day" +"%Y%m%d"`.sql.bz2; done > /dev/null 2>&1 Shoved that in my crontab. Works great. Linux rocks.

I sit here watching Egyptians partying in Tahrir Square on the Internet. Mostly because Al Jazeera is the only group that hasn’t just totally halfassed the coverage of what has unfolded a half a world away. However, I did flip on CNN to watch some coverage on there. "No dictator, no invader can hold an imprisoned population by force of arms forever. There is no greater power in the universe than the need for freedom. Against that power, governments and tyrants and armies cannot stand." G'kar, Babylon 5 They interviewed several of the protesters and organizers. All of them young - even relative to me, and I ain’t exactly an old guy - and all of them taking the time to actually thank*for making the revolution possible. What were they thanking? Facebook and Twitter. One guy even said he hoped he could meet Mark Zuckerberg and thank him personally. "People with a passion can change the world for the better." Steve Jobs It occurs to me that these are the Digital Natives coming of age and taking power. To these people, the Internet is an integral part of their life, and have no memory a time before using the Internet to communicate. They think nothing of talking to people around the world. They’ve been exposed to worldwide ideas. Social and political borders mean nothing to them. They’re all old ideas. The ideas of their parents. We are just now beginning to grasp the social ramifications of a worldwide network that connects all people. The Internet is, for lack of a better analogy, like a virus that infects the world’s population. People can access the world’s repository of knowledge, and talk with people around the world with minimal effort. They can organize with minimal effort. This communication infects them with ideas of freedom and a desire to communicate. Now, to be sure, the Internet didn’t get out there and protest. The Internet didn’t physically stand in Tahrir Square and chant protests against Mubarak. The Internet didn’t take gunshots for freedom. But the Internet and social media did provide the tools and the framework in which the revolution could be organized. People will always be the ones taking action. But the ability to communicate - quickly, efficiently, and massively, in such a way that was unthinkable twenty years ago - is going to completely reshape the way the world works going forward. Iran was the warmup. Egypt and Tunisia are the warning shots to nations around the world: neglect your people at your own peril. Now, as for Egypt. The optimist in me hopes for a democratic republic. The pessimist in me fears a military dictatorship or, worse, an Islamic dictatorship. I guess we’ll know soon enough.

I have more than 20 various IM accounts set up in Adium on my Macintosh. But during the day, the only one I really want to be active is the one I use for work. The remainder, I want to leave logged in, but showing as away with a warning not to bother me unless it is important. But half the time I forget to set all those accounts as away, or I forget to set the work one as available, or some other issue that would arise out of a manual process interferes and too often it doesn’t get done. Enter AppleScript. I whipped up a surprisingly easy AppleScript to do just this: tell application "Adium" go away with message "Working. Please do not disturb unless necessary." go available first account end tell Because the work account is the first one, this makes it easy. It just sets all accounts as away and then sets the work one available. I shove this in my MarcoPolo ruleset to fire when I arrive at the office. The script to reverse the change when I leave is even easier. This is fired when I leave the office: tell application "Adium" to go available