>>>>> "Scott" == Scott Howard <[email protected]> writes:

Scott> This is driving me crazy.  I install Ubuntu Server on a
Scott> portable drive at home.  Fire it up on a wired network and
Scott> check ifconfig.  It dutifully gives me the internal ip address
Scott> from my router and is able to access the internet.  I then
Scott> dutifully reboot the machine turning it off after everything is
Scott> killed but before the reboot starts.

Scott> The scene changes to my office where I turn on a different
Scott> machine with no drives but the portable drive on the USB port.
Scott> Ubuntu server boots up and works just fine until I sudo
Scott> ifconfig.  The internal loop shows 127.0.0.0 shows but the
Scott> wired network ip address does not.  Init.d/networking restart
Scott> gets an eth0 no such device message.

Scott> Ubuntu LiveCd on the office machine get the network and
Scott> internet just fine.

Scott> Any thoughts or help would be appreciated or even a large
Scott> hammer would be appreciated.

Does ifconfig -a show a different ethernet interface?  Sometimes udev
rules map ethernet macaddrs to specific interface names, and if a
non-match is found, then the new macaddr gets a new interface name
(eth1, eth2, etc).  In debian-land, the culprit is:

  /etc/udev/rules.d/70-persistent-net.rules
 
... and yes, this is slightly crazy in many contexts.  It really only
is well adapted for situations when you are using the box as a router
and want to make sure the "inside" and "outside" remain distinct.


-- 
Russell Senior, President
[email protected]
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