Technology Insights

Find The Ram Speed in Linux from a CLI Shell

Here is the next in my series of posts as I tweak the new tools server to reach its full potential. I recently added a Intel i7 965 Extreme chip to the server and I am trying to get all the kinks ironed out. One thing I suspect is that the ram is not operating at its full potential. Both the ram and the chip list that they are capable of reaching a 1600 MHz speed so I want to get them running at that speed. Normally these things are fairly easy in Windows where we have a GUI and all kinds of fancy oveclockers tools but as you know from previous articles this server is a extreme definition of hybrid and it also runs a server version of Cent OS so we have no GUI. This has brought me to discover many new and interesting Linux CLI tools. Today I will show two different ways to check your ram speed and also get some other useful information.

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Technology Insights

PostgreSQL Log Entries: CDTLOG: statement: SHOW client_min_messages

I was troubleshooting an issue at work the other day regarding some PostgreSQL connections that were not closing. They were left IDLE, never closed, and eventually used up all of the possible connections (which totaled 100) configured in the  postgresql.conf configuration file. In the process of troubleshooting I noticed a bunch of Postgres log entries that I was unable to immediately pin down to what was causing the entries. Below I describe the view of the idle Postgres connections, the PostgreSQL log entries that were unfamiliar, and the cause of both.

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Covert a Image to Vector Graphics Format for Free

I had one of my clients call me today and say he wanted to make some T-shirts with his logo picture, that I was using on his website. I said OK and sent him the .jpeg file. He called me back twenty minutes later and said his T-shirt guy wanted the image in a vector graphics format. Now I am not sure why the T-shirt guy wouldn’t have the software to convert it however thats not my problem. In any case I always like to try to find free software to complete tasks like this. I have used a program called Inkscape in Linux many times but I had no idea what to do in Windows. Fortunately, there is a version of Inkscape for windows.

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How to Merge Multiple WLAN (IEEE 802.11) Captures into One File

I recently had a customer upload a WPA capture to our tools.question-defense.com server which failed immediately. This can happen from time to time and is for a variety of reasons Sometimes if captures does not contain all 4 eapol packets they will fail , and sometimes if a capture has lots of other wifi garbage in the .cap file it can confuse the cracking program. This last time was a new situation. After the fail I analyzed the cap file and determined that the essid was not present in the capture. This is absolutely crucial for the decrypting process. In this short article I will show how I determined the essid was not present and what I did about it.

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LM_Sensors on Cent OS 5.4: How To Get And Install The Coretemp Module

If you have been following my progress over the last few days you will know that after a complete rebuild of the tools server and a change of the operating system, I have been working hard to get all our temp monitoring back online. The server previously ran Gentoo Linux, which although is still my favorite distro, is just not suited for a production server environment.  So we decided to go with Cent OS which is a very well built distro aimed at running on production servers. My only complaint is that its kernel and some of its packages are a little bit out of date.  On the bright side, this has given us a few challenges to work through and more importantly some good articles to share.  So after getting my GPU temps going and graphing I turned my attention to the cpu. We are currently running a Intel i7 965 Extreme edition which I just put in last night. In the following article I will show how I eventually got lm_sensors and the coretemp module to work on Cent OS 5.4

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