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The power of “netstat” in 10 easy steps

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This is a quick guide to some not so obvious command-line options available in the Linux netstat command. I hope you enjoy it.

1. Plain old netstat

Without any command-line arguments, “netstat” shows a list of network connections in your system, including TCP, UDP and UNIX socket connections.

If you want to speed up things a bit, use “-n” (numeric) to prevent network lookups and display IP and port numbers instead of names.

2. Seeing all connections with “netstat -a”

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