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Can’t use ping in Ubuntu

I'm not sure this question is relevant in this forum, but I really need your helps. I'm using Ubuntu 9.04, and when I do a ping to any ip or host, what I got were always 100% packet loss. This is terrible, since I cannot do many things in my textbook. Please help me to fix this problem. Thank you very much

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migrated from serverfault.com Aug 12 '09 at 18:07

This question came from our site for system and network administrators.

marked as duplicate by TheTXI Aug 12 '09 at 21:32

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

What happens if you ping yourself? –  gbarry Aug 12 '09 at 16:29
+1 to gbarry Are you sure that you are connected to a network... and if so is it dhcp? did you get an ip address? –  TimK Aug 12 '09 at 16:42
Duplicate of superuser.com/questions/21859/cant-use-ping-in-ubuntu –  Isxek Aug 12 '09 at 18:18
This needs to be deleted, the other question has many of the answers needed. –  Troggy Aug 12 '09 at 19:42

2 Answers 2

Have you tried turning off your iptables firewall? It might be...over eager.

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It's possible you have a bad network card and/or a bad patch cable. Was it working before and has now suddenly stopped?

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