Nmap, or the Network Mapper, is a powerful command-line tool for diagnosing network problems, finding security vulnerabilities, and host of other uses. Its many options and scanning methods can be daunting to even the most experienced of end users, but nmapFE is a graphical interface for nmap that makes it easy to use even the most powerful aspects of the network mapper, and can be a life-saver when you run into networking problems.

In this tutorial learn about a number of different UNIX tools and techniques to diagnose Network problems

For every person who has said, "Let's network these two computers" there are many more asking "Why is the network running so slow?" Yet, the ethereal nature of Ethernet has long made computer networks hard to decipher and many a business or home user has longed to peek into the data stream to see just what is going on.

Is your Net connection slow? Ever wonder what the hell’s going down the wire? Here are five free and effective tools to diagnose network traffic issues.

Awareness of what's happening on your network, and why, makes the difference between average and excellent network administration. Great tools are needed to obtain this knowledge quickly and accurately. Fortunately, some of the best network monitoring tools are free. This article lists the top five.

One of the first things I do upon installing a Linux distribution is put the Network Monitor applet on my GNOME panel. Watching the blue lights twinkle on and off makes me aware of network traffic.

Network Security Toolkit is one of many live CD Linux distributions focusing on network monitoring, analysis, and security. NST was designed to give network security administrators easy access to a comprehensive set of open source network applications, many of which are among the top 100 security tools recommended by insecure.org.

Network latency and bandwidth are the two metrics most likely to be of interest when you benchmark a network. Even though most service and product advertising focuses on bandwidth, at times the latency can be a more important metric. Here's a look at three projects that include tools to test your network performance: nepim "network pipemeter," LMbench, and nuttcp.

Linux is an excellent platform for network administration. If you want to monitor your network traffic, you can find many tools -- some accessible from a Web interface, others using a graphical interface -- but nothing beats the speed of the command line.