//View Tip #813
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The command below will monitor open TCP connections:

watch -n 1 "netstat -tpanl | grep ESTABLISHED"

This will show connections by processes you can view, or if done as root ("sudo netstat") all processes.

Another option to perform the same task is:

sudo lsof -i -T -n

Again watch could be used with this, or adding -r as an option will make lsof refresh the output.

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I'm a big fan of:

watch -d "lsof -nPi"

A million ways to skin a cat. Thanks for the great content!
Posted 2009-05-14 13:09:11

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