GRUB 2 Introduction

**drs305** · October 11th, 2009

Originally Posted by professorYaffle

Okay - I found the problem. Looks like "(hd0,0)" should be "(hd0,1)". This works, but is rather confusing! Has grub2 really switched to counting partitions from 1 instead of 0, but at the same time not switched counting disks from 0 to 1?

Yes, that is correct. A bit confusing - you just have to remember it.

**bapoumba** · October 11th, 2009

Ping ranch hand : http://ubuntuforums.org/showpost.php...2&postcount=65

**ranch hand** · October 11th, 2009

Originally Posted by bapoumba

Ping ranch hand : http://ubuntuforums.org/showpost.php...2&postcount=65

That is great. This is going to be a bugger, I think, and the more info out there the better.

drs305 has really been digging deep. Really great stuff. FUN too.

Thanks

**stevetxt** · October 11th, 2009

I am trying to simplify my grub2 menu and have cleaned it up a bit and changed titles and unneeded entries thanks to these posts. Now I'm wondering about the Memtest86 entries. I get two: "Memory test (memtest86+)" and "Memory test (memtest86+, serial console 115200)".

Can anyone advise why there are two and if it is a good idea or not to remove them from the menu by making the 20_memtest86+ file nonexecutable?

**ranch hand** · October 11th, 2009

I would like to know why there are two of the buggers too. They seem to work the same.

If you don't use the memtest, I don't think most people do very often, you can certainly make the 20_memtest86+ file non-executable. If you ever feel the need for it you can always change it back.

You could add an entry to your custom file for it too and just turn off 10_linux, 20_memtest96+, 30_os-prober and 40_custom (unless it is the one you are using for your custom emtries) and still havethe option of the memtest on your menu.

I have turned all that stuff off but it is back on again so that I can see what it is doing. When I get a "real" install of 9.10 you can bet that stuff will be gone.

If you have it all turned off now you can't play with all the neat stuff that drs305 is coming up with.

**stevetxt** · October 11th, 2009

What about the option

GRUB_DISABLE_LINUX_RECOVERY=true

That would clean up the menu nicely, but is this a bad idea?

**ranch hand** · October 11th, 2009

That should work too, but not for the memtest stuff.

**stevetxt** · October 11th, 2009

What I mean is, is it a bad idea to remove the recovery entries from the grub 2 menu?

**ranch hand** · October 11th, 2009

Well, that is up to you. They are real handy when you need them.

This is a beta. I want mine where I can get to it.

That said, I have several OS' booting with grub2 so if I can get into one of them, I can get to all of them easily. If I wanted I could kill everything but the custom menu on all but one of them and boot from one of the short ones. Then if i needed some thing more just change where I am booting from to the long one and have it all there.

**drs305** · October 11th, 2009

stevetxt,

If you don't have a recovery mode displayed, you can stop the G2 menu, select a menu item and press E, then on the linux /boot/vmlinuz.... line just add the word "single" and boot (CTRL-X).

The question is, will you remember this when your computer is crashing?