Archive for the ‘How To’ Category

How to file a DBA (Doing Business As / Registration of Fictitious Name) in Missouri for $7.00 Oct 23 2008

Grilling
Now we’re cookin! πŸ™‚

It’s surprisingly simple to get a Fictitious Name registered in Missouri, and it only happens to cost $7.00.

Simply click here: Missouri Registration of Fictitious Name and then fill out two simple online forms (takes about 1 minute), submit your credit card info for $7.00 and you’ll get an immediate confirmation of your name and PDF invoice and registration documents to download.

Very handy if you’re applying to something like the iPhone Developer Program and they need to see documentation… πŸ™‚

Formula Sensei - iPhone formula calculator

Formula Sensei - iPhone formula calculator

Mac OS X voices for using with the ‘say’ command Aug 19 2008

A neat trick if you have a Mac OS X machine is to do this (make sure your speakers are turned on):

  1. Open Terminal.app
  2. Type in at the command line: say hello world

This will make your computer say “hello world” in the default voice (Victoria).

Here is a list of the other voices you can also use:

Female Voices

  • $ say -v Agnes "hello world"
  • $ say -v Kathy "hello world"
  • $ say -v Princess "hello world"
  • $ say -v Vicki "hello world"
  • $ say -v Victoria "hello world"

Male Voices

  • $ say -v Bruce "hello world"
  • $ say -v Fred "hello world"
  • $ say -v Junior "hello world"
  • $ say -v Ralph "hello world"

Novelty Voices

  • $ say -v Albert "hello world"
  • $ say -v "Bad News" "hello world"
  • $ say -v Bahh "hello world"
  • $ say -v Bells "hello world"
  • $ say -v Boing "hello world"
  • $ say -v Bubbles "hello world"
  • $ say -v Cellos "hello world"
  • $ say -v Deranged "hello world"
  • $ say -v "Good News" "hello world"
  • $ say -v Hysterical "hello world"
  • $ say -v "Pipe Organ" "hello world"
  • $ say -v Trinoids "hello world"
  • $ say -v Whisper "hello world"
  • $ say -v Zarvox "hello world"

Have fun. You can now add voices to your monitoring applications, or freak people out if they don’t know about this cool trick.

To learn about all of the functionality of the say program, type in man say in Terminal to learn more, or click here to view the online man page for say.

How to check if your DNS server is vulnerable to the recently discovered DNS exploit Jul 28 2008

In case you’ve missed the recent news about the major DNS exploit problem and haven’t checked to see if your DNS server is vulnerable, this site has a checker that will test to see if your DNS server appears to be patched or not.

Recently, a significant threat to DNS, the system that translates names you can remember (such as www.doxpara.com) to numbers the Internet can route (66.240.226.139) was discovered, that would allow malicious people to impersonate almost any website on the Internet. Software companies across the industry have quietly collaborated to simultaneously release fixes for all affected name servers. To find out if the DNS server you use is vulnerable, click below.

Check your DNS server here: DoxPara Research.

(via David Shea @ Mezzoblue, found on RSS2)

Why you should upgrade your WordPress installation to version 2.6 (just released) today Jul 15 2008

WordPress 2.6 is Available! Security Advisory to upgrade ASAP!

First, the good news: Matt & his brave crew of WordPress coders have just released version 2.6 of the Open Source award-winningly awesome content management system called WordPress (download it here). I’ve been using it since it was called b2, and love it. I recommend it for most of my clients, and they love the simplicity and ease of use. I also really like how easy it is to customize and extend, using the excellent theme and plugin system.

If you have a WordPress installation yourself, please upgrade it today. Why should you do it today? In short, not only does the latest version of WordPress have some awesome new features (like content change tracking, a new “Press this” browser bookmark, using Google’s Gears system to make it faster, and about 194 bug fixes) it also contains the latest SECURITY FIXES.

Why should you care about security fixes? Because older versions of WordPress are vulnerable to exploits. I know this for a fact, and have been working on cleaning out a number of older installations of WordPress that have been hacked. This isn’t a fun process, and if you stay up to date, you will have the best chance of not getting hacked yourself.

This isn’t a problem exclusive to WordPress, and they’ve done a really good job generally at fixing holes (the current release proactively fixes a number of potential issues), but it is an issue you should definitely look into.

On a Unix machine, one thing to look for is this pattern in any files: md5($_COOKIE'

You can do a search through all your hosting accounts by running this command (run as root):
# grep -R 'md5($_COOKIE' /home/

That will tell you if you have any infected files (for this particular exploit). If you find any, you need to clean out those files. If you are running your sites out of version control (like using svn), this may be slightly easier.

$ svn st should tell you if any files were changed from the last time you checked them out. If you see unexpected files show up, you’ve been hacked.

To clean out your installation, not using version control method (done as root in this case):

  1. Copy your whole public_html directory to another location so you can do forensics on it and copy valid files back into your new installation:
    # cd /home/USERNAME/
    # mkdir public_html-hacked
    # mv public_html/* public_html-hacked/
  2. Download a clean copy of WordPress into your public_html:
    # cd /home/USERNAME/
    # wget http://wordpress.org/latest.zip .
    # unzip latest.zip
    # cp -R wordpress/* public_html/
    # chown -R USERNAME:USERNAME public_html/*
  3. Create a new wp-config.php file. It’s probably a really good idea to first change your MySQL database password. To create your new config file:
    #cd public_html/
    # cp wp-config-sample.php wp-config.php
    # vi wp-config.php

    Enter the correct (new) values for your MySQL database name, username, password, and the (currently 3) authorization unique key values (go to http://api.wordpress.org/secret-key/1.1/ to automatically generate the 3 keys for you to copy/paste into your config file.
  4. Next, upgrade your WordPress database: http://example.com/wp-admin/upgrade.php. You’ll have to sign in with your admin username and password. Once this is done (should go without a hitch, hopefully), examine your user table to see if there are any entries there that shouldn’t be. Delete any users that you didn’t create. Also, it would be a good idea to update the password for each user in the system.
  5. Go through all of your Settings, looking for any suspicious changes. Specifically notice what the Uploads directory is set to (in Settings->Miscellaneous). It should probably be set to something like wp-content/uploads. If it says something like ../../../../../tmp/ change it back. Also go look there to see if there are any left-over files that need to be investigated and removed.
  6. Make a local copy backup of your database and then clean out entries that don’t belong there. Check your raw database (using something like PHPMyAdmin or command line mysql tools) and examine the wp_users table. Look for a user called WordPress. Delete it! If you found it, also check the wp_usermeta table and delete all entries associated with the bogus WordPress user ID. Next, check through your other MySQL tables to look for any suspicious entries (attached files, comments, posts, etc.) Delete anything that looks incorrect or wrong, but be sure not to delete your actual content.

As you can see, there are lots of things to check for if your installation of WordPress gets compromised. So, to save yourself a lot of pain and suffering, make sure you upgrade your WordPress installation(s) just as soon as you can.

More good info if you think your WordPress installation has been hacked:

How to connect to a VNC machine that is behind a firewall using SSH tunneling, OS X and Chicken of the VNC Jun 20 2008

VNC is a very useful program for accessing a computer remotely. These are instructions for accessing a remote machine using OS X, Chicken of the VNC, and Vine Server when there is a firewall in the way.

VNC SSH Tunnel

Normally it is a fairly straightforward process to connect from a VNC client to a VNC server running on a remote machine. A firewall in the middle can complicate the process a bit.

Normal:
MY MACHINE -> VNC CLIENT < - -> VNC SERVER < - REMOTE MACHINE Behind firewall: REMOTE MACHINE -> VNC SERVER -> SSH TUNNEL < - -> VNC CLIENT < - MY MACHINE

  1. On MY MACHINE, create a local SSH user account and password – call it vnc_user
  2. On MY MACHINE, determine my public IP address – go to whatismyip.com (MY_IP_ADDRESS)
  3. On REMOTE MACHINE, turn on the Vine Server and set the password
  4. On REMOTE MACHINE, open up Terminal and enter the following command:

    ssh vnc_user@MY_IP_ADDRESS -R 5900:127.0.0.1:5900

    where MY_IP_ADDRESS is the IP address of MY MACHINE.

  5. Enter the password for the vnc_user. You should now be connected to MY MACHINE over SSH.
  6. On MY MACHINE, open up Chicken of the VNC. Connect to localhost and enter the password for the REMOTE MACHINE.
  7. You should now be connected to REMOTE MACHINE’s VNC server and be seeing their screen.
  8. Notes:

    • Make sure that you are not running a VNC server on MY MACHINE, or that it is turned off
    • If you are running a firewall on your own network, you may need to enable port forwarding for SSH to ensure that SSH requests on port 22 are connected to MY MACHINE and not blocked by your own firewall.

    Thanks to this article that describes how to do this and also includes an Applescript that makes the connection.

Christian Science Cross and Crown logo – How to get a high-quality vector EPS or PDF version for use in your design comps Apr 29 2008

Let’s say, hypothetically, that you are a designer, and are working on a design comp for a Christian Science church or reading room, and you wanted a high resolution vector version of the logo to use in your mock-up so you didn’t have to chop out background garbage out of some low-resolution version of the logo you found on the web somewhere. What should you do?

In the Cross and Crown trademark licensing documentation, you will find the following instructions:

Two approvals are necessary:
(1) for your type of use (sign, etc.) and
(2) for the actual form of your use (how the sign appears).
Therefore, if you already have a sample or mock-up of the proposed use, please send it by e-mail or regular mail along with the Request Form, so both approvals can be done simultaneously. It will save you time later.

Unfortunately, they do not currently provide any links to a high-resolution version of their logo for purposes of laying out a design, which would be very helpful to all the designers out there trying to help their clients prepare a mock-up of the proposed usage.

Update: I’ve removed the instructions for how to extract a vector version of the logo out of a PDF since they’ve changed the PDF available on their site to only include a raster version now, and it would probably be more helpful to more people in the long run if they hear the need for a vector version for placement in design comps from a number of people rather than trying to work-around the system they’re offering.

My suggestion is you contact the trademark administrator directly and request a vector version of the logo if the high-resolution JPG version of the logo isn’t sufficient for your usage. Their email address is trademark@csps.com.

How to help the Children’s Eternal Rainforest in Costa Rica get $1,000 for $10 right now. Jan 4 2008

Monteverde Conservation League, U.S.

It’s super simple: Click this link, then join the Facebook Causes group for Monteverde Conservation League and donate any amount.

Right now, if we can get another 7 donors in the next 22 hours the Children’s Eternal Rainforest will get $1,000 for free. So your tax-deductible $10 donation could help save another $1,000 worth of rainforest in Costa Rica.

Check it out, and give a little if you can:
Join the Children’s Eternal Rainforest cause on Facebook

How to fix PEAR installation of XML_RSS / XML_Tree invalid package.xml file problem Dec 18 2007

As part of getting an upgraded server set up and transferring sites from the older server, I had to re-install PEAR XML_RSS. One of its dependencies is XML_Tree.

Normally, this command should have worked with no problems:

pear install XML_RSS

It downloaded XML_RSS just fine, but then choked on XML_Tree, which was a required dependency.

Initial output:

# pear install XML_RSS
Did not download dependencies: pear/XML_Tree, use --alldeps or --onlyreqdeps to download automatically
pear/XML_RSS requires package "pear/XML_Tree"
No valid packages found
install failed

My next try was to specify installing XML_Tree:

# pear install XML_Tree
WARNING: "pear/XML_Tree" is deprecated in favor of "pear/XML_Serializer"
downloading XML_Tree-1.1.tgz ...
Starting to download XML_Tree-1.1.tgz (4,826 bytes)
.....done: 4,826 bytes
XML error: not well-formed (invalid token) at line 10
Download of "pear/XML_Tree" succeeded, but it is not a valid package archive
Error: cannot download "pear/XML_Tree"
Download failed
install failed

After some troubleshooting, here is how I fixed this problem:

  1. Change directory into the PEAR download cache directory: cd /tmp/pear/cache/
  2. Clear out all the old cache files: pear clear-cache
  3. You should see the downloaded file: XML_Tree-1.1.tgz
  4. Extract the files: tar xvfz XML_Tree-1.1.tgz
  5. Now edit the extracted package.xml file: vi package.xml
  6. Go to line 10 and change the â to an o. This is the character that is causing the XML validation of the package file to fail. Next, save the file (ESC :wq)
  7. Next, remove the old .tgz file: rm -rf XML_Tree-1.1.tgz
  8. We’re going to recreate the package: tar cfv - package.xml XML_Tree-1.1/ | gzip > XML_Tree-1.1.tgz
  9. Next, we’re going to install this package and not use the network: pear install -O XML_Tree-1.1.tgz

XML_Tree is now installed. You should now be able to continue installing XML_RSS normally.

How to sync audio and video for DVD playback using your remote speakers, AirPort Express, Rogue Amoeba’s Airfoil and VLC Dec 3 2007

Apple AirPort Express

I’ve been enjoying using my Apple AirPort Express to stream music from my laptop to our living room speakers using iTunes. The other evening I wanted to watch a DVD and use the good speakers to get the best sound, but you can’t do that without using a helper program.

Rogue Amoeba's Airfoil

I found a program that lets you route any audio signals to your AirPort Express — it’s called Airfoil (free to try out, $25 to purchase) and is made by Rogue Amoeba. It’s very simple to install and run. When I tried playing a DVD, though, the audio didn’t synch properly with the video.

This is the solution I found to fix the audio synchronization problem using VLC to play back the DVD and by adjusting the preferences and using VLC’s ability to buffer audio and adjust the synchronization settings.

How to increase audio buffering amount in VLC for DVD playback

  1. Open preferences in VLC
  2. Click on Advanced tab on bottom of screen
  3. Select Input/Codecs
  4. Select Access Modules
  5. Select DVD with menus [Note: to make this same adjustment when you are playing back regular files as opposed to DVDs, simply select File instead of DVD with menus and continue with the rest of the instructions]
  6. Change the default value (300 milliseconds) to 6000. This will increase the amount of audio data buffering to 6 seconds, which should be enough to synchronize the audio playback.
  7. Click Save to activate your changes (you may need to quit VLC to ensure the settings become active).
  8. Re-open the DVD using VLC and click Play.
  9. Click the “f” key repeatedly to adjust the amount of audio synchronization offset. It adjusts the audio offset downwards by 50 millisecond increments. I had to set mine to around -4900 milliseconds to correctly match the audio with the video output on my system. Press the “g” key to increase the offset in the other direction. Watch the actor’s lips and adjust the offset until it matches perfectly.
  10. Enjoy listening to your DVD audio through your speakers, streamed wirelessly!

Hacking the Gibson

Download VLC (Free Open Source video player)

Download Airfoil

Prove it. Jun 17 2007

Question: What do scientists consider to be valid evidence for a theory? How should studies be conducted to prove efficacy of treatment options? How can we tell, scientifically, if something really works or not?



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