How do I drop to shell from rescue CD???
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From: Robert Nichols on 20 May 2010 10:48 On 05/19/2010 02:30 PM, Ohhhh maaan wrote: > Hans-Peter Diettrich wrote: > >> Ohhhh maaan schrieb: >> >>> I have a kernel panic and need to fix a typo. I don't have the >>> install disks, and I just want to use the CD to access the shell >>> prompt so I can run the commands need. I can't get to the grub boot >>> loader screen. >> >> Can you still boot any live-CD, and apply your corrections from there? >> >> DoDi > > I may be able to, I will check. I suppose, in the meantime, that the > rescue CD is intended for a specific purpose then and it's not > something you can drop into shell from (at least without physical > console access or going through some rescue mode steps)? It might help to know where this "CentOS 5.x rescue CD" came from. I know about "Live CD", "Installation CD", and "Installation DVD", but it sounds as if you have something different. My personal choice for system maintenance is SystemRescueCd from http://www.sysresccd.org . I have it on a USB flash drive that I generally keep close at hand. -- Bob Nichols AT comcast.net I am "RNichols42"
From: Ohhhh maaan on 20 May 2010 23:36 Sidney Lambe wrote: > On comp.os.linux.misc, Ohhhh maaan <nobodyhere(a)example.com> > wrote: > >> Sidney Lambe wrote: >> >>> On comp.os.linux.misc, Ohhhh maaan <nobodyhere(a)example.com> >>> wrote: >>> >>> [delete] >>> >>> This is a stupid thread. >> >> Not really. >> >>> You stick the rescue cd into the slot and you reboot >> >> Obviously. >> >>> and then you mount the hdd make your repairs. >> >> I think the "stupid" thing here, is that you're hostile and >> paranoid and you lack the ability to read what was said. >> There's no "repair" to make, > > And the thread just gets stupider. As soon as you entered it, I agree. > Go away. You're not the boss of this group. > <plonk> Right back at ya, kook! > Bet I already have a dozen of the aliases you hide behind > in my killfile. Yes, that's what people spend their days doing. > [delete] That makes no sense. > Sid T.r.o.l.l.
From: Ohhhh maaan on 20 May 2010 23:39 Keith Keller wrote: > On 2010-05-20, Ohhhh maaan <nobodyhere(a)example.com> wrote: >> >> Yes, I'm certain that's what it's running off of, but how to get to >> it? I.e., if I was in a boot loader (lilo), I could CTRL+X, if I was >> in grub, I could type linux single... or any number of things. > > Just to be clear, ctrl-X from lilo offers a lilo shell. I believe > grub > has a similar capability (a?). But neither is a bash or sh shell, > which > is what you'd need to fix a broken grub. Yeah. > And if (as you mentioned > somewhere else) this is a drive that was mirrored from another working > drive, depending on exactly how it was mirrored it may not have grub > on the MBR, and you'll need a linux shell to fix that. Yeah. I figured out that the media was bad. I was able to boot into the rescue kernel, but it wasn't able to read the rescue image. Once it was, I was able to gain the normal shell. .... > >> Right, but the KVM access I have doesn't allow this. That would >> indeed be very simple. > > Well, not to sound snide, but it's not the fault of the CD if your KVM > doesn't allow this. Of course not. But, that's why I was asking. > But jellybean offered another potential solution, > using init=/bin/bash or /bin/sh. I've used this to try to reset a > root password, but it might be helpful in your situation as well. I had attempted that, but it didn't work from the rescue disk's boot: prompt. Turns out it was just a bad CD image.
From: Ohhhh maaan on 20 May 2010 23:39 jellybean stonerfish wrote: > On Wed, 19 May 2010 19:22:48 -0700, Ohhhh maaan wrote: > > <Rest of thread cut> >> if there's a way to just skip all of that, bypass that junk and drop >> into a shell prompt > > Add "init=/bin/sh" to the kernel options at the start of your cd boot. Tried it, and it didn't work from the rescue CD. Turns out it was a bad image on the disk though.
From: Ohhhh maaan on 20 May 2010 23:40
jellybean stonerfish wrote: > On Wed, 19 May 2010 19:28:05 -0700, Ohhhh maaan wrote: > >> just hopeful there was some command I could pass to the boot: prompt >> or some combination of keys or whatever, so I could bypass all of >> that, have it load the kernel from the rescue CD disk and drop me >> into shell. I guess that unless I have the rescue image it needs and >> it's able to complete those steps, that I have to have someone boot >> from a live CD instead (if they have that option available). >> > > > pass 'init=/bin/sh' or 'init=/bin/bash' to the kernel. I had attempted that previously, didn't work from rescue disk. In the end, it was a bad image on the (CD) disk. |