This is pretty much for my own reference, so please ignore if you already know these. 🙂 Batch convert a directory of PNGs to GIF: mogrify -format gif *.png Resize everything in the directory: mogrify -resize 96x96 -colors 128 -depth 8 * Remove transparency (can make filesizes bigger, so don’t […]
Technology
Since the default version of ImageMagick installed by yum on CentOS 5.5 is 6.2.something, and you want to be able to do all the cool stuff that ImageMagick 6.5.* and 6.6.* can do, you’re gonna have to compile it from source yourself. Don’t worry – it’s easy, and it works.
How to Get ImageMagick 6.5.x or 6.6.x Working on CentOS ...
180 Update! RPMs and Yum now available. I build and maintain the RPM packages of OpenDKIM for RHEL/CentOS and Fedora, which are available with Yum. For a much quicker and easier way to install OpenDKIM, read this. Of course, if you still prefer to go old-skool and compile your own binaries […]
How to get DKIM (DomainKeys Identified Mail) working with Postfix ...
The new Xbox 360 game Halo:Reach was released today, and as always, CheatCodes.com was the first to have the cheats and achievements for Halo Reach. You can get Halo: Reach cheats at http://www.cheatcodes.com/xbox360/halo-reach-xbox-360/
Halo Reach Cheats and Achievements
11 I ignored the early warning signs: the slow boots, the strange noises, the polite requests to insert the install DVD and run the disk utility. My main problem was that I’d lost my install DVD a long time ago. I had purchased my Mac Mini G4 1.5Ghz brand new in 2005, […]
Mac Mini G4 1.5Ghz Hard Drive and RAM Upgrade
Starting with Fedora 10 (and continuing with Fedora 11 and Fedora 13), graphical root login was disabled by default. Allowing root login to the GUI poses a number of security risks, so doing so is not recommended. In most cases, using sudo or simply authenticating as the superuser in the […]
How To Enable Root Login to GUI in Fedora 13
Earlier this year, I wrote a blog post detailing how to set up VNC on a Fedora 12 Box and connect to it from a Windows VNC client securely over the Internet. The original article is here. The steps to setting up VNC on RHEL 5.5 and CentOS 5.5 are […]
Set up VNC on RHEL 5.5 / CentOS 5.5
Don’t waste your time looking for cheats at CheatCC or Cheat Code Central. Go to: CheatCodes.com That’s what you really want. CheatCC cheat code central has nothing on these guys! For Xbox 360, PS3, Wii, Nintendo DS, PC games, and more. They have way more cheats and cheat codes than […]
CheatCC Cheat Code Central
If you’re having trouble activating your new AT&T iPhone 4, or if you got an error message when you tried to activate your AT&T iPhone using iTunes or on the AT&T website, don’t worry. Here are some easy instructions to activate it by phone.
How to Activate Your AT&T iPhone 4
One of my web servers sent me this email this morning: Subject: The certificate for ServerName.com has expired ################# SSL Certificate Warning ################ Certificate for hostname 'ServerName.com', in file (or by nickname): /etc/pki/tls/certs/server.crt The certificate needs to be renewed; this can be done using the 'genkey' program. Browsers will not […]
Renewing a Self-Signed SSL Certificate on Fedora/CentOS
My wife often notes that I wear a lot of T-shirts. She’s right. 100% cotton T-shirts are comfortable, stylish, and they allow me to express myself; whether it’s my devotion to a certain Italian racing team or making such bold statements as “I’m gonna come at you like a Spider Monkey,” […]
Getting Rid of Old T-Shirts
81 With the insane prices map software companies are charging these days for replacement map DVDs (used in DVD-based nav units), it’s a smart idea to create a backup of your nav DVD in case of theft, loss, or damage. I’ve used the following method to back up the MDV-09D data […]
How to Backup your Navigation DVD/CD
I’m writing this in a VNC session from Windows 7, via a secure SSH tunnel over the Internet, to a remote Fedora 12 desktop (if you’re running Fedora 14, I’ve written a separate blog post about how to do that, too). If you’d like to be able to do the […]
Set up VNC from Windows to Fedora 12 Over the ...
5 Don’t get too excited… it’s not as awesome as God Mode in DOOM, but it is a fun little easier egg for uber-geeks hiding under the hood of Windows 7. Windows 7 God Mode allows you to tinker with all of the the operating system’s control panel items from within a single […]
Activate Windows 7 God Mode
36 If you’re an “ultimate” geek running an “Ultimate” edition of Windows (such as Windows Vista Ultimate or Windows 7 Ultimate), but you want to upgrade or downgrade to Windows 7 Professional, Windows 7 Home Premium, or Windows 7 Home Basic, you’ve got a problem: the Windows 7 installer won’t allow […]
Upgrade (or Downgrade) Windows 7 Ultimate or Vista Ultimate to ...
30 Officially, Microsoft says a direct migration from a Windows 2000 Server Domain Controller to Windows 2008 R2 (or even just regular Windows 2008) isn’t supported. But I just did it… in about an hour. You can, too!
Migrating an Active Directory Domain Controller from Windows 2000 to ...
To stay connected while I’m out of the office or travelling, I use a VPN connection from my laptop to a Windows Server. And while the benefit of being able to quickly and securely access my documents and other files on the server over any Internet connection is nice, the drawback is that all […]
Using the Local Default Gateway with a Windows VPN Connection
I used Version 1 of Windows Live Family Safety when it first came out. It was an idea long overdue: hosted control over which websites, IM contacts, and email addresses your kids are allowed to use, with some built-in monitoring. When I upgraded to the new version in August of […]
Using Windows Live Family Safety with a Windows Domain
I’ve got a Dell Studio 1737 laptop, on which I dual-boot Windows 7 and Fedora 12. But with the default graphics drivers installed by FC12, I’d receive an Accelerated Graphics Not Available error message if I tried to enable System > Preferences > Desktop Effects. The solution was to do: […]
Enabling Desktop Effects on Fedora 12 with ATI Radeon HD ...
This post is mostly for my own reference, just in case I need to rebuild a server and want to save myself the Googling. These links helped: Nagios Core 3.x Docs – The quick-start guide was great. I recommend compiling yourself instead of using yum so that your paths match […]
Helpful Links For Setting Up Nagios and NRPE on RHEL ...
4 I recently noticed that my /boot partition was at 95% full, so I investigated to see what was causing it. Apparently, it was filling up with older versions of the linux kernel as a result of upgrades. Because my system has been very stable, I decided to keep only the […]
Removing Old Kernels on Fedora, RHEL, or CentOS with Yum
For about a year now, we’ve been happily running two Dell PowerEdge 2950s with quad procs, 4GB of RAM (or so we thought), and RHEL5. Running a high-traffic website can be memory intensive, so we recently decided to upgrade the memory, and bought 8 more GB of RAM for each […]
Running more than 4GB RAM on Fedora, RHEL, & CentOS
In a cabinet in a top secret location somewhere in the Pacific Northwest, I’ve got two Dell PowerEdge 2950s, each with four 2GB DIMMs installed. I purchased four additional 4GB DIMMs to upgrade the memory in both to a total of 16GB, and installed them in the servers last night, so […]
Dell Warning: The current memory configuration is not optimal.
4 A few months ago, I installed two software upgrades in my 2007 Maserati Quattroporte GT Sport: an enhancement module for the drive-by-wire system, and an ECM peformance chip, both developed and manufactured by Formula Dynamics. They both made huge differences to the car’s performance. Until recently, neither unit had produced […]