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xen-users
Re: [Xen-users] resetting lost root password on a xen guest
Darren Jacobs wrote:
Hi All,
I need to get into a xenguest running linux for which the root
password has been lost. I'm running xen 3.0.3 under RH 5.
I'm trying to figure out how to get pygrub for this guest to load up
the typical "init=/bin/sh" to get the console to come up at the
command line prompt so I can reset the root password.
Why? Can't you shut down the DomU, mount the DomU's "/" partitin, do a
chroot to it, and edit it from the Dom0?
If not, you should be able to use "xm create -c domain" to get the grub
console and boot into single user mode, unless you've been very fascist
about your grub configuration.
Trolling though google I've see suggestions to add args =
'init=/bin/sh' or opts = 'init=/bin/sh' to the guest configuration
file. None of them appeared to have worked. If I do a 'xen create
echo11 -n' after making any of the above file mods I see that the args
were not modified:
--
(vm
(name echo11)
(memory 500)
(on_reboot restart)
(on_crash restart)
(vcpus 1)
(uuid cb855323-2867-b84a-d766-32a39d252bb7)
(bootloader /usr/bin/pygrub)
(image
(linux
(ramdisk /var/lib/xen/initrd.kIQYUw)
(kernel /var/lib/xen/vmlinuz.Xwl81-)
(args 'ro root=/dev/VolGroup00/LogVol00')
)
)
(device
(tap (uname tap:aio:/var/lib/xen/images/echo11) (dev xvda)
(mode w))
)
(device (vif (bridge xenbr0) (mac 00:16:3e:69:69:90)))
--
So I tried to bring the guest up manually from dom0 with " pygrub
/var/lib/xen/images/echo11.dsk". When the menu comes up I edit the
kernel line directly and insert "init=/bin/sh". You can see below
that the init statement was indeed read:
See, this is where you should use "xm create -c 'DOMAIN'"
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