5.9. Network Diagnostic Tools
The following diagnostic tools are available to help answer your questions about network performance.
5.9.1. netstat
Netstat provides a wealth of metrics on network activity. It reports packet in-and-out metrics, collisions (Ethernet only), and errors, as well as memory consumed by the network portion of the kernel for network buffers.
Providing statistics for network interfaces and protocols, netstat also reports the contents of various network-related data structures. The output format varies according to the options selected. The following is a partial example of the output for netstat -aAn, which displays a list of active sockets. Internet connections are listed first, followed by Unix domain connections:
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