Satellite Tracking with Linux
Information about SatTrack for Unix is available at http://www.primenet.com/~bester/sattrack.html.
SatTrack 3.1 can be downloaded and used free for private, non-commercial purposes, and the author, Manfred Bester, offers version 4.0 of SatTrack with more options and a more graphical interface for commercial use.
Figure 5: SatTrack Orbit Prediction Short Form
Figure 6. SatTrack v4.0.1 GUI for Multi-Satellite Line Display
To get a taste of using SatTrack to predict times of visibility in a satellite's orbit, check out http://ssl.berkeley.edu/isi_www/satpasses.html.
For more information about amateur radio, see the home page of the American Radio Relay League: http://www.arrl.org/.
For information about Amateur Radio satellites in particular, see the home page of AMSAT, the National Amateur Radio Satellite Corporation: http://www.amsat.org/.
For information about the Shuttle Amateur Radio Experiment, see http://www.nasa.gov/sarex/sarex.html.
Ken Harker, N1PVB has been a licensed radio amateur since October,1993, and an avid Linux user since June 1995. He's currently a graduate student in the Computer Sciences at the University of Texas at Austin.
Realizing the promise of Apache® Hadoop® requires the effective deployment of compute, memory, storage and networking to achieve optimal results. With its flexibility and multitude of options, it is easy to over or under provision the server infrastructure, resulting in poor performance and high TCO. Join us for an in depth, technical discussion with industry experts from leading Hadoop and server companies who will provide insights into the key considerations for designing and deploying an optimal Hadoop cluster.
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Enter to Win an Adafruit Pi Cobbler Breakout Kit for Raspberry Pi

It's Raspberry Pi month at Linux Journal. Each week in May, Adafruit will be giving away a Pi-related prize to a lucky, randomly drawn LJ reader. Winners will be announced weekly.
Fill out the fields below to enter to win this week's prize-- a Pi Cobbler Breakout Kit for Raspberry Pi.
Congratulations to our winners so far:
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How to Build an Optimal Hadoop Cluster to Store and Maintain Unlimited Amounts of Data Using Microservers
Realizing the promise of Apache® Hadoop® requires the effective deployment of compute, memory, storage and networking to achieve optimal results. With its flexibility and multitude of options, it is easy to over or under provision the server infrastructure, resulting in poor performance and high TCO. Join us for an in depth, technical discussion with industry experts from leading Hadoop and server companies who will provide insights into the key considerations for designing and deploying an optimal Hadoop cluster.
Some of key questions to be discussed are:
- What is the “typical” Hadoop cluster and what should be installed on the different machine types?
- Why should you consider the typical workload patterns when making your hardware decisions?
- Are all microservers created equal for Hadoop deployments?
- How do I plan for expansion if I require more compute, memory, storage or networking?




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