[GRLUG] "network is unreachable"

[Bob Kline]

On Sat, Feb 13, 2010 at 12:02 AM, Michael Mol <mikemol at gmail.com> wrote:

> 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
>


Sounds right.  More later.

    -- Bob
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