without sudo, i got this
[ 0.170000] ubda: unknown partition table[ 0.170000] Warning: Assigning
a globally valid ethernet address to a device[ 0.170000] You should set the
2nd rightmost bit in the first byte of the MAC,[ 0.170000] i.e.
02:50:f9:00:00:66[ 0.170000] Netdevice 0 (00:50:f9:00:00:66) :[ 0.170000]
TUN/TAP backend - IP = 10.50.181.51[ 0.200000] EXT3-fs (ubda): error:
couldn't mount because of unsupported optional features (240)[ 0.210000]
EXT2-fs (ubda): error: couldn't mount because of unsupported optional features
(244)[ 0.220000] EXT4-fs (ubda): INFO: recovery required on readonly
filesystem[ 0.220000] EXT4-fs (ubda): write access unavailable, cannot
proceed[ 0.300000] UDF-fs: No partition found (1)[ 0.330000] NILFS: Can't
find nilfs on dev ubda.[ 0.360000] GFS2: gfs2 mount does not exist[
0.360000] List of all partitions:[ 0.360000] 6200 100000 ubda
driver: uml-blkdev[ 0.360000] No filesystem could mount root, tried:
reiserfs ext3 ext2 ext4 squashfs vfat msdos iso9660 ntfs fuseblk udf nilfs2
btrfs gfs2 gfs2meta[ 0.360000] Kernel panic - not syncing: VFS: Unable to
mount root fs on unknown-block(98,0)[ 0.360000] 0fc6bedc: [<084d18bc>]
dump_stack+0x1c/0x20[ 0.360000] 0fc6bef4: [<084d190d>] panic+0x4d/0x13f[
0.360000] 0fc6bf28: [<08048ca5>] mount_block_root+0x20d/0x21c[ 0.360000]
0fc6bf78: [<08048d00>] mount_root+0x4c/0x54[ 0.360000] 0fc6bf9c:
[<08048e54>] prepare_namespace
> From: r...@gmx.co.uk
> To: user-mode-linux-user@lists.sourceforge.net
> Date: Fri, 2 Dec 2011 15:50:50 -0600
> Subject: Re: [uml-user] Can i run uml in the background ?
>
> On Friday 02 December 2011 15:10:35 ning ji wrote:
> > Guess the answer is yes,but when i run
> > #sudo ./umlinux ubda=./fs6 mem=128M
> > eth0=tuntap,,00:50:F9:00:00:65,10.50.181.51 & i got this
> > [1]+ Stopped sudo ./umlinux ubda=./fs6 mem=128M
> > eth0=tuntap,,00:50:F9:00:00:65,10.50.181.51
> >
> > Any hints pls ?Thanks !
>
> Why are you running this as root? There are safe ways to set up
> networking while maintaining reduced privilege in the UML instance
> itself.
>
> Can you background it as non-root?
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