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Missing eth0 Ethernet interface in Ubuntu — can't connect to router

Fresh3 days ago
Mar 15, 2026243897 views
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Problem

I'm having trouble getting my Ubuntu 10.04 machine (Sony Vaio VGN-SR490) to connect to the Internet by way of an Ethernet cable connected directly to my router. I'm able to connect to the Internet using this same cable using a Windows machine, so there's something wrong with the way Linux is config…

Error Output

$ ifconfig

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP…

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1 Fix

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Fix for: Missing eth0 Ethernet interface in Ubuntu — can't connect to router

Low Risk

First of all, your ethernet isn't being managed by Ubuntu. Try instead of just , so you can see all your networking devices, managed or not. If you do see ethX in the list, the solution should be straightforward, and you seemed to have gotten half o…

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