'INVALID magic number' grub2 debian

qrange · 05-06-2011, 10:31 AM

I get error 'invalid magic number' when using this
vmlinuz 2,417,247 bytes

if I use this:
vmlinuz 2,417,312 bytes

then later it complains about kernel mismatch

??

alan_ri · 05-06-2011, 04:07 PM

What are trying to do? And what on Earth is vmlinuz 2,417,247 bytes or 2,417,312 bytes?

qrange · 05-06-2011, 04:14 PM

i'm trying to do this: http://www.linuxquestions.org/questi...om-hdd-861783/
its the size of vmlinuz file

alan_ri · 05-06-2011, 04:32 PM

Yes I knew that it is a size, but you don't need vmlinuz size for what you want to do. I believe in the link you posted druuna explained some things very well (I had a quick look).

There's an error;

Quote:

'cannot copy file from cdrom'

...but you said you want to install without cd/dvd I believe, so what you want to do?

qrange · 05-07-2011, 04:09 AM

but vmlinuz is bad. I used the size to identify 'version' instead of md5sum. that last version druuna gave me produces that error. it is referring to iso as cdrom, I guess.

can you mix vmlinuz with different initrd.gz ?

I think I'll just give up and install the damn thing from dvd.

ps. sorry for starting another thread about this. I'd delete it.

alan_ri · 05-07-2011, 06:54 AM

vmlinuz is not bad.

Just so that it stays written here;

Quote:

Traditionally, UNIX platforms called the kernel image /unix. With the development of virtual memory, kernels that supported this feature were given the vm- prefix to differentiate them. The name vmlinux is a mutation of vmunix, while in vmlinuz the letter z at the end denotes that it is compressed.

http://www.debian.org/ has a lot of documentation etc. For example, have a look here; http://www.debian.org/releases/stabl...h04s04.html.en Read that, then Section 5.1.4 and you should be ready to go.

Mixing vmlinuz with initrd.gz for some other vmlinuz is a bad idea, trust me.

qrange · 05-07-2011, 07:14 AM

if it weren't bad, I wouldn't get 'invalid magic number'. I did everything by manual.

but the documentation you linked to does not provide download link for the vmlinuz and initrd.gz that would work with latest debian_testing_amd64.iso

alan_ri · 05-07-2011, 10:54 AM

Well I won't say much, I'll post two links and I'll tell you what I've learned over the years; if you're using Linux you need to remember two words; search and read.

http://forums.debian.net/viewtopic.php?f=17&t=52153
http://ftp.debian.org/debian/dists/t...ages/hd-media/