TCP/IP Troubleshooting Tools
Problems rarely appear once a TCP/IP network is configured. However, networking equipment fails, lines go down, and cables get disconnected. Also, problems can arise during the initial configuration of a networked host.
Linux has three basic network troubleshooting tools. Two of them, ping and traceroute, are concerned with the capability of a host to reach another, while the third one, tcpdump, is useful for analyzing the flow of traffic in a network.
ping
The most basic network troubleshooting tool is the ping program. Named after the pinging sound made by submarine sonars, ping sends out packets to another host and waits for that host to reply to them. ping uses ICMP (Internet Control Message Protocol), a protocol ...
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