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Re: Can't bring up the network

Pre-up can be empty, it's not always used.  It's a place to put scripts that should be run before bringing the interface/network up.

There should be a log somewhere like in /var/log/apt. If you figure out what it was trying to load you can put back the old version with dpkg -i <file>. The debs on the box are in something like /var/cache/apt/archive.  Dpkg -i will install any deb over another, it's good for reverting.

Similar nightmare on my rock64, that's why I'm on a phone.

Sent from my Motorola XT1527

On Thu, Jun 7, 2018, 11:57 AM Jerry Stuckle <stucklejerry@gmail.com> wrote:
A little background.  I have Debian-arm 3.2.0-4-vexpress running under
QEMU.  This has been working fine, but in serious need of an upgrade.
So I ran apt-get update and apt-get upgrade.  This resulted in a long
process of updating packages.

Unfortunately, the hosting system crashed while the upgrade was running.
  This resulted in some packages which were only partially installed.

In trying to get things back I found the network interface (eth0) did
not come back up.  Trying to start it with ifup eth0 results in

/bin/sh: 1: run-parts: Exec format error
Failed to bring up eth0

Adding --verbose gives

run-parts --exit-on-error --verbose /etc/network/if-pre-up.d
/bin/sh: 1: run-parts: Exec format error
Failed to bring up eth0

/etc/network/if-pre-up.d is empty, which is what I suspect is the cause
of the problem.  However, I don't know what should be in there on this
system - or what package is supposed to install it.  QEMU is emulating a
standard ethernet port (not wifi).  Other systems I have installed use
wifi, so will (obviously) have something different in here.

The problem is, I'm a programmer, Jim, not a Unix Administrator.  I
could use any suggestions someone might have.

And once this gets fixed I can try to correct the other problems created
by the aborted upgrade.



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