In this article, I’ll try to explain as much as I can about hashes and collisions and my latest discovery of a triple hash collision while keeping things as simple as possible. What Is A Hash: It’s a cryptographic function, which takes some data as input, and generates a string, usually composed of hex characters. Now,…
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I wrote a previous article about obtaining the BIOS version on a Dell Poweredge 650 server which had the end goal of updating the BIOS version on the server if a new BIOS version was available. So after obtaining the BIOS version of the Poweredge 650 server I needed the Dell Service Tag from the…
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I have a development server, which is a Dell Poweredge 650, running CentOS Linux that is used for testing PostgreSQL database replication via log shipping and recently the server has been crashing after only running for a couple hours from a kernel panic. One of the things I wanted to verify is if there is…
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Recently I was doing a security audit on a Linux server and noticed some Apache and PHP items that needed to be modified to make the server more secure. One of the items that should be disabled is allow_url_fopen because the risk that it can be abused. The issue is that allow_url_fopen is on by…
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The LCD TV in my office started having issues with the LCD screen a couple weeks ago so I had to take the TV in to get the screen replaced. Luckily the LCD panel happened to be under warranty or I would have been out $2200. Regardless though it left me without the TV in…
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Yesterday we had to upgrade a Ubuntu Linux server from a really old version of Ubuntu to the latest and greatest version of Ubuntu. When attempting to run the upgrade from the command line from a file on a Ubuntu CD we were getting an error which is described in more detail below along with…
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Earlier today I needed to use sort to output unique lines from a file to a new file but ran into an issue. I was attempting to use the sort command on a Windows 7 computer with Cygwin installed. Below is information on the initial error I received and then how it was resolved.
Once I finally made it past the PHP build process the Litespeed Admin Console Detailed Log complained of not being able to find autoconf. This one is fairly obvious but wanted to note just in case someone is not familiar with the autoconf package. Again since this is a new server with a minimal install…
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Another error I ran into while attempting to build PHP via the Litespeed Admin Console. This error directly related to the MySQL libraries or the MySQL version. Below is more information on the error itself and how the error was resolved. This error was resolved by simply installing a couple MySQL packages via the yum…
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