Re: is booting an OS without power cycling a host possible?

2012-03-17 Thread Goh Lip
On 03/18/2012 05:24 AM, Peter Van Wieren wrote: The running system indeed could change grub.cfg to default to distribution "B", and I could reboot. "B" should start OK. My concern is that if "B" fails to boot, for whatever reason, or upon booting "B" I find that it lacks the tools to modify the

is booting without power cycling possible?

2012-03-17 Thread Peter Van Wieren
I have a host with linux distribution "A". The host is presently running "A", and has already been started by grub. There exists, on a second hard disk drive, linux distribution "B" is installed but not mounted. I hoped I could transition from "A" to "B", without power cycling the host or edi

Re: is booting an OS without power cycling a host possible?

2012-03-17 Thread Drake Donahue
On Sat, 2012-03-17 at 14:24 -0700, Peter Van Wieren wrote: > The running system indeed could change grub.cfg to default to > distribution "B", and I could reboot. "B" should start OK. > > My concern is that if "B" fails to boot, for whatever reason, or upon > booting "B" I find that it lacks the

Fwd: Re: is booting an OS without power cycling a host possible?

2012-03-17 Thread Arbiel Perlacremaz
Message original Sujet: Re: is booting an OS without power cycling a host possible? Date : Sat, 17 Mar 2012 23:44:58 +0100 De :Arbiel Perlacremaz Pour : Peter Van Wieren To my opinion, there is no way to swich from distribution "A" to distribution "B". Grub is no GN

Re: is booting an OS without power cycling a host possible?

2012-03-17 Thread Peter Van Wieren
I missed including help-grup on the reply to Arbiel's question. Here was that reply: > After the entire boot process is > complete, and an OS is running normally, I was wondering if > it was possible to simply execute a new kernel/initrd which > would replace the current one. > > An analogy wou

Re: is booting an OS without power cycling a host possible?

2012-03-17 Thread Peter Van Wieren
The running system indeed could change grub.cfg to default to distribution "B", and I could reboot.  "B" should start OK. My concern is that if "B" fails to boot, for whatever reason, or upon booting "B" I find that it lacks the tools to modify the MBR / grub.cfg then I will never ever be to r

Re: is booting an OS without power cycling a host possible?

2012-03-17 Thread Leslie S Satenstein
I am a little confused. Currently I have a grub.cfg that has three operating systems in the list.  If I reboot, the default value setting boots that operating system. So, if I am right, all that is required is for the system that is handing over control, to change the default setting in the grub

Re: is booting an OS without power cycling a host possible?

2012-03-17 Thread Arbiel Perlacremaz
I do not quite understand what you want to do. Is that that, in a first stage, you want to boot distribution A, and then, in a second stage, switch to distribution B, as though you had directly booted distribution B. This is definitely not possible. Now, there is no difficulty to have grub2 (f

is booting an OS without power cycling a host possible?

2012-03-17 Thread Peter Van Wieren
I have a host with linux distribution "A". The host is presently running "A", and has already been started by grub. There exists, on a second hard disk drive, linux distribution "B" is installed but not mounted. I hoped I could transition from "A" to "B", without power cycling the host or edi

Re: Installing GRUB on 2048b Sector Size ?

2012-03-17 Thread Stefan Misch
Hi Mohammed, As the error message says, writing to a partitionless Disk is a Bad idea. Try to partition it and then install grub. Regards, Stefan Mohammad Badie Zadegan schrieb: Hi, I want to install GRUB on 2048 Byte Sector Size . My USB Device is 4GigaByte Sony Walkman and accessible on /

Installing GRUB on 2048b Sector Size ?

2012-03-17 Thread Mohammad Badie Zadegan
Hi, I want to install GRUB on 2048 Byte Sector Size . My USB Device is 4GigaByte Sony Walkman and accessible on /dev/sdf I tried with these commands but still did not bootable !! How can i bootable it with GRUB or other Bootloaders ? root@bt:~# grub-install /dev/sdf /usr/sbin/grub-setup: warn: At

Re: Secure boot with GRUB

2012-03-17 Thread Chris Murphy
On Mar 16, 2012, at 7:33 PM, satish kondapalli wrote: > Hi, > > is GRUB2 supports secure boot with UEFI? Anyone please explain in general > how secure boot will work with GRUB2. > How to sign the grub.efi? That's not the only issue. The practical issues are the complication, not as much the