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What is a decent tool I can use on a ubuntu server command line to measure my network bandwidth on that machine to see if I'm saturating the network card or not? I have a crawler running on a box and I'm not sure how to best monitor if I need to add more boxes or not.

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migrated from stackoverflow.com Jul 14 '10 at 17:04

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possible duplicate of Network bound / network pipe monitoring on Linux? –  Warner Jul 14 '10 at 17:09

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up vote 3 down vote accepted

Command line wise, iptraf is one of my favorite tools for a quick login&check method, and should give you a quick idea of what your current speeds are as well as what the box is doing.

Its not command line, but for more long term monitoring, I would suggest SNMP monitoring. Cacti+snmp works very well to get constant information from your server, and creates up nice little graphs for you to see how your bandwidth is doing.

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