[ubuntu] Unable to connect to internet with ethernet and no idea what to do about it in 10.04

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http://ubuntuforums.org – I'm rather new to Linux/Ubuntu and about to lose my religion figuring this one out. I am unable to connect to the internet with ethernet in 10.04 64bit. Everything was working fine this morning, but when I booted up this evening, no connection. In Network Connections, under the Wired tab, Auto eth0 reads Last Used: never. Also, Network Manager had created a new network, Wired Connection 1. I deleted Wired Connection 1. This morning the system attempted to run a check, which I cancelled. So I rebooted and allowed the check to run. Now, no connections appear in the Wired Network b (HowTos)