A Intermittent Problem: I wrote a Perl script for Nagios that would figure out the bandwidth of an interface by parsing TX (transmit) and RX (receive) bytes from /proc/net/dev. The proc file system is a virtual file system that provides the ability to view various kernel statistics as well as modify some kernel parameters. My… Continue Reading
Introduction: I just got a new G1 Android phone, and since it runs Linux I just had to get the Bash shell running on it, the built in shell would just not do. I do need my tab completion after all. Cross compilation is the process of compiling software on one platform that is meant… Continue Reading
Introduction For a system administrator it is important to have an efficient and comfortable interface to all your servers. GNU Screen is an excellent utility to be able to have a single terminal connected to multiple servers that won’t disappear when you close the window. I have a set up that allows me to spawn… Continue Reading
Introduction: GNS3 is a graphical network simulator that is integrated with the Cisco router emulator Dynamips. In this tutorial I will explain how to connect your Linux host to an emulated 7200 series router, then that router to another 7200 router, and finally that second router will be connected to a Linux VM running in… Continue Reading
Wojciech Kocjan’s Learning Nagios 3.0 is a clear and gentle introduction that takes readers through the basics and introduces them to the more advanced topics of infrastructure monitoring with Nagios. The writing has a good balance of concise technical information while also providing thorough examples in a tutorial style. This keeps the book from being… Continue Reading