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Is there a commandline tool for GNU/Linux which will analyse download and upload speed, packet-loss, latency and other factors which will indicate internet connectivity status?

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I'm not sure if this of interest, but iftop shows bandwidth usage. – Faheem Mitha May 16 '11 at 19:19
@Faheem Mitha, if your comment was an answer I'd upvote it! hint hint – kce May 16 '11 at 21:25
@kce: Have at it. :-) – Faheem Mitha May 16 '11 at 21:29
See also How to test Internet connection speed from command line? (only covers download; for upload you'll need some server's cooperation). – Gilles May 16 '11 at 21:33
up vote 4 down vote accepted

You can use iftop to show bandwidth usage.

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You could use ping, netstat or traceroute. You'll find a small introduction here.

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