[ubuntu-us-mi] Knoppix-like recovery with Ubuntu?

[Jeff Hanson]

The alternate CD will not work live.  It only has BusyBox.  It does not
contain an installed filesystem, only packages.
It is possible to boot a live CD from an ISO using Grub.  There are various
how-tos on Ubuntu's web site.
I generally just boot the live CD with PXE over TFTP/NFS.  Not easy to set
up but very easy to use once it is.  I can boot about two dozen live ISOs
off my server.  Useful for demonstrating the various GUIs.
For general-purpose data recovery I use Parted Magic which can PXE boot
over just TFTP.


On Fri, Sep 5, 2014 at 10:51 AM, Robert Citek <robert.citek at gmail.com>
wrote:

> Thanks, Scott,
>
> Here's what I normally do to install/repair an Ubuntu server:
>
> 1) download ISO image
> 2) burn CD or 'dd' to USB stick
> 3) boot from CD/USB stick
> 4) install/repair system
> 5) eject CD/USB stick
> 6) reboot into system
>
> The above instructions also work in a VM (e.g. VirtualBox) where I
> "attach" the ISO as a virtual CD-ROM.
>
> Thinking I would try out the process in a VM before attempting this in
> the data center, I downloaded the cloud image
> (
> http://cloud-images.ubuntu.com/releases/14.04/release/ubuntu-14.04-server-cloudimg-amd64-disk1.img
> )
> to my local system.  However, when I attempt to use the image in a VM
> as an attached CR-ROM, VirtualBox refuses to attach it.  This is
> understandable as it is not an ISO image, but a disk image.  I was
> able to attach it as a hard disk, but it would not boot.  VBox
> complained with "no bootable medium found."
>
> Although the concept sounds intriguing, I think I'm missing the
> step(s) on how to use this disk image to help me install or repair a
> server.
>
> Regards,
> - Robert
>
>
> On Fri, Sep 5, 2014 at 5:42 AM, Scott Moser <smoser at brickies.net> wrote:
> > On Thu, 4 Sep 2014, Robert Citek wrote:
> >
> >> Hello all,
> >>
> >> A few nice features of Knoppix are that it has bash, fdisk/parted, LVM
> >> utilities, and an ssh service.  In this way I can boot to a live CD via
> a
> >> limited KVM, start ssh, then ssh to the system to work on recovering a
> >> broken Ubuntu server system with LVM.
> >>
> >> I tried to do the same using the rescue mode on the server CD but
> without
> >> success. Is there a way to do what I do with Knoppix, but using an
> Ubuntu
> >> CD?  Perhaps the alternate CD?
> >
> > I'd recommend using the cloud images.
> > They're pretty much perfect for this task.
> >
> > download the ubuntu-14.04-server-cloudimg-amd64-disk1.img image from
> >   http://cloud-images.ubuntu.com/releases/14.04/release/
> >
> > Follow
> >
> http://ubuntu-smoser.blogspot.com/2013/02/using-ubuntu-cloud-images-without-cloud.html
> >
> > You'll just want to also attach your other disks, and then log in and do
> > whatever you want.
> >
> > (As an aside, you may want to just *start* from those imgaes in the
> future
> > and avoid installs entirely).
> >
> >
> > Scott
> >
> >>
> >> Regards,
> >>  - Robert
> >>
> >
> > --
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