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I can't connect to the Internet via wireless network or Ethernet I can connect to the router, but when I launch Firefox, it tells me I can't connect to the server

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What Ubuntu release are you running? –  Mitch Jun 5 '13 at 19:55

1 Answer 1

Try to ping an IP-address to see if it is a DNS problem:

ping -c4

If this does'nt work, please edit your question to contain output from these commands: lspci and ifconfig

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