[GRLUG] "network is unreachable"

[Michael Mol]

On Fri, Feb 12, 2010 at 11:54 PM, Bob Kline <bob.kline at gmail.com> wrote:
> On Fri, Feb 12, 2010 at 11:45 PM, Michael Mol <mikemol at gmail.com> wrote:
>> On Fri, Feb 12, 2010 at 11:38 PM, Bob Kline <bob.kline at gmail.com> wrote:
>> > On Fri, Feb 12, 2010 at 5:20 PM, Michael Mol <mikemol at gmail.com> wrote:
>> >> On Fri, Feb 12, 2010 at 5:19 PM, Bob Kline <bob.kline at gmail.com> wrote:
>> >> > On Thu, Feb 11, 2010 at 1:03 PM, <donlumber at comcast.net> wrote:
>> >> >>
>> >> >> ----- Original Message -----
>> >> >> From: "Bob Kline" <bob.kline at gmail.com>
>> >> >> To: grlug at grlug.org
>> >> >> Sent: Wednesday, February 10, 2010 10:03:18 PM GMT -05:00 US/Canada
>> >> >> Eastern
>> >> >> Subject: [GRLUG] "network is unreachable"
>> >> >>
>> >> >> I somehow managed to hose the
>> >> >> Ethernet connect on a laptop running
>> >> >> Ubuntu 9.10.  The bottom line is that
>> >> >> when I try to ping an outside URL I get
>> >> >> "network is unreachable."  I've done
>> >> >> some searching on the Internet for
>> >> >> this, but so far nothing clicks.
>> >> >> Some relevant things:
>> >> >> *  ifconfig shows that eth0, lo, and wan0
>> >> >>    are gone, so I set them all to "up."
>> >> >> * /etc/resolv.conf looks OK.
>> >> >> * I can ping 127.0.0.1, but nothing outside.
>> >> >> * "/sbin/dhclient wlan0" was not running,
>> >> >>   so I started it.
>> >> >> *  I've done other A-B comparisons with
>> >> >>    a machine also running Ubuntu 9.10,
>> >> >>   and has a working eth0 port, but so far
>> >> >>   nothing has shown me the key thing
>> >> >>   that is missing.
>> >> >> One suggestion on the Internet was to
>> >> >> use dhcpcd, but I don't have it installed,
>> >> >> and can't do it now.  The machine does
>> >> >> not have a CDROM unit, and of course I
>> >> >> don't have Internet access.....
>> >> >> Does this much suggest anything to try
>> >> >> to anyone?  I've power cycled, but some
>> >> >> software might be missing, and when
>> >> >> I come back up I have to run ifconfig again
>> >> >> to set things up.
>> >> >>    -- Bob
>> >> >>
>> >> >> _______________________________________________ grlug mailing list
>> >> >> grlug at grlug.org
>> >> >> http://shinobu.grlug.org/cgi-bin/mailman/listinfo/grlug
>> >> >>
>> >> >>
>> >> >>
>> >> >> Have you tried removing /etc/udev/rules.d/70-persistent-net.rules ?
>> >> >
>> >> >
>> >> > I tried it, and a new file was generated.
>> >> > But I still get "Network is unreachable"
>> >> > when I try to ping anything other than
>> >> > 127.0.0.1
>> >> >    -- Bob
>> >>
>> >> As root, what's the output of "ifconfig" and "route"?
>> >> --
>> >
>> > ifconfig:  lo - loopback - is the only thing that appears.
>> > route:  the column headings show, but there are
>> > no contents.
>> > Both on bootup.
>> >    -- Bob
>>
>> ls /sys/class/net/
>>
>>
> eth0 lo wlan0
> and those each point to something in /devices.
>    -- Bob

Grab a flash drive. Get NetworkManager reinstalled.

http://packages.ubuntu.com/karmic/net/network-manager

-- 
:wq