[wellylug] User Mode Linux - anyone had any luck with it?

[Grant McLean]

On Wed, 2005-03-09 at 18:16 +1300, Cliff Pratt wrote:
> I'm trying to get UML running and I'm having problems. I'm 
> using the Debian unstable package and I've tried various 
> fiel-systems and all have some problem or other.
> 
> In particular the two Debian one I acquire from sourceforge 
> both stop at the stage of "Setting the system clock....".

I had a brief foray running Woody in UML under Sarge.  It sounds like
you have a different problem to the one I struck.  In my case, the fsck
at boot time failed with this message:

    fsck.ext2: No such file or directory while trying to open /dev/ubd/0

This was because the filesystem image I was using didn't have the devfs
package installed.  I did manage to get things going by loopback
mounting the filesystem and copying in the relevant deb file, booting it
up single user mode and installing the package.

The following disjointed notes that I took at the time may offer you
some clues (unfortunately they mean next to nothing to me now but as you
know senility is setting in).

mv Debian-3.0r0.ext2 root_fs-dist

dd if=/dev/zero of=root_fs count=1 bs=1k seek=$[4*1024*1024]
mkfs -t ext3 root_fs

mkdir /mnt/m1
mkdir /mnt/m2

mount -o loop -t ext2 /home/grant/uml/root_fs-dist /mnt/m1
mount -o loop -t ext3 /home/grant/uml/root_fs /mnt/m2

cp -a /mnt/m1/* /mnt/m2
rm -r /mnt/m2/lib/modules/*
cp -a /usr/lib/uml/modules/* /mnt/m2/lib/modules/


wget
http://ftp.nz.debian.org/debian/pool/main/d/devfsd/devfsd_1.3.25-1_i386.deb

cp devfsd_1.3.25-1_i386.deb /mnt/m2/

umount /mnt/m1
umount /mnt/m2

./linux

mount -n -o remount,rw /
dpkg --install /devfsd_1.3.25-1_i386.deb
halt

./linux devfs=mount



dd if=/dev/zero of=swapfs bs=1k count=1 seek=$[512*1024]
mkswap swapfs

./linux devfs=mount ubd1=swapfs

Add to /etc/fstab:

  /dev/ubd/1      none            swap    sw              0       0


./linux devfs=mount ubd1=swapfs eth0=tuntap,,,192.168.2.77