Carla Schroder

Last week we learned how to use iperf to measure network throughput, jitter, and datagram loss. Today we’re going to learn more excellent ways to measure network performance using iperf and ntop, but first I have a couple of corrections to make. OpenWRT, Little Blue Boxes, and Heavy Loads In Tips and Tricks for Linux […]

At the cost of great exertion and mental prowess, I have collected just for you an astounding assortment of useful commands and tools for performing amazing feats like network host discovery and mapping your network, mapping IP addresses to their physical locations, spying on everyone who is logged into a computer and even better, faster, […]

VoIP call quality isn’t always what it should be. Sometimes it is plagued by jitter, echo, lag–even dropped calls. In the next two articles you’re going to learn how to prioritize your VoIP traffic to get the best quality. Linux has all the tools you need to do this. All that’s required from you is […]

The flood of inexpensive x86 PC hardware that overwhelmed the computing world seduced us into accumulating coveys of cheap little single-purpose servers and unmanageable gaggles of desktops and workstations. We sysadmins have been paying for it ever since. Instead of having small herds of nice docile mammoths to supervise, we got roped into running large […]

If I had to give a general summation of printing in Linux I would have to say “better than dismal, but not much.” Hardware vendors barely produce tolerable drivers for Windows, let alone us weirdo hippie Linux users. Strangely enough, many of them are finding it in their hearts to support Mac OS X. It’s […]

At this time of year it’s irresistible to take a look back. It was an interesting and fun year, and it was also a year full of events that left me scratching my head and wondering if any grownups are in charge. First, the Good Stuff 1. Ubuntu Linux Seemingly out of nowhere came a […]

One of the first things a hardworking Linux network admin learns is to never ever throw anything anyway, because somewhere, someway, someday, you might need it. Or even if you don’t need it, you just never know what clever hacks you’ll be inspired to perpetrate. Linux encourages this sort of thing–if you haven’t spent happy […]

There you are all bright-eyed and eager, ready to roll up your sleeves and go to work in the exciting new world of Free/Open Source software. You have rosy visions of getting paid to do enjoyable, challenging work. Maybe even fat stock options that vest while you are still young, so you can quit the […]

Linux Kernel 2.6 has been in stable release for months now, which is like dog’s years in kernel time. Kernel releases are exciting times for Linux geeks, because it’s just plain fun to be able to replace the kernel on a system, or have several different kernels installed, and choose among them as the whim […]

Linux Kernel 2.6 has been in stable release for months now, which is like dog’s years in kernel time. Kernel releases are exciting times for Linux geeks, because it’s just plain fun to be able to replace the kernel on a system, or have several different kernels installed, and choose among them as the whim […]