#90 Monitoring Network Status
One of the most puzzling administrative utilities in Unix is netstat, which is too bad, because it offers quite a bit of useful information about network throughput and performance. With the -s flag, netstat outputs volumes of information about each of the protocols supported on your computer, including TCP, UDP, IPv6, ICMP, IPsec, and more. Most of those protocols are irrelevant for a typical configuration; the protocol to examine is TCP. This script analyzes TCP protocol traffic, determining the percentage of failure and including a warning if any values are out of bounds.
Analyzing network performance as a snapshot of long-term performance is useful, but a much better way to analyze data is with trends. ...
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