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• LDP HOWTO Index, section 4.4: categorized list of HOWTOs about general networking, protocols, dial-up, DNS, VPNs, bridging, routinfg, security and more.
• Most systems have a version of the ip-cref file (locate it using the locate command); the PS format of this file is viewable with for instance gv.
10.2.4. Network interface names
On a Linux machine, the device name lo or the local loop is linked with the internal 127.0.0.1 address. The computer will have a hard time making your applications work if this device is not present; it is always there, even on computers which are not networked.
The first ethernet device, eth0 in the case of a standard network interface card, points to your local LAN IP address. Normal client machines only have one network interface card. Routers, connecting networks together, have one network device for each network they serve.
If you use a modem to connect to the Internet, your network device will probably be named ppp0.