December 2005
Intermediate to advanced
1066 pages
33h 38m
English
Content preview from Understanding Linux Network InternalsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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User-Space Tools
Different tools can be used to configure the many networking features available on Linux. As mentioned at the beginning of the chapter, you can make thoughtful use of these tools to manipulate the kernel for learning purposes and to discover the effects of these changes.
The following tools are the ones I will refer often to in this book:
- iputils
Besides the perennial command
ping, iputils includesarping(used to generate ARP requests), the Network Router Discovery daemonrdisc, and others.- net-tools
This is a suite of networking tools, where you can find the well-known ifconfig, route, netstat, and arp, but also ipmaddr, iptunnel, ether-wake, netplugd, etc.
- IPROUTE2
This is the new-generation networking configuration suite (although it has been around for a few years already). Through an omnibus command named ip, the suite can be used to configure IP addresses and routing along with all of its advanced features, neighboring protocols, etc.
IPROUTE2's source code can be downloaded from http://linux-net.osdl.org/index.php/Iproute2, and the other packages can be downloaded from the download server of most Linux distributions.
These packages are included by default on most (if not all) Linux distributions. Whenever you do not understand how the kernel code processes a command from user space, I encourage you to look at the user-space tool source code and see how the command from the user is packaged and sent to the kernel.
At the following URLs, you can find good documentation ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.