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From: Alex Schuster <wonko@wonkology.org>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] unmounting /usr in single user mode
Date: Mon, 19 Jul 2010 21:06:12 +0200
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Allan Gottlieb writes:

> I am unable to umount /usr in single user mode on an old system.
> I believe the system is baselayout-1 and is amd64.
> The trouble is open files, at least some of which appear to be related
> to bash and locale (see the files below).
> 
> I use grub.  On the kernel line can I specify sh instead of bash?
> I know sh is linked to bash, but hope that it will not use locale.

Why not use a live-cd?

> I need to umount /usr so that I can resize it (I use lvm and have
> already extended the logical volume).  Specifically i want to execute
> umount /usr
> resize2fs /dev/vg/usr
> mount /usr

As long as you extend the size, resizing works online, without the need to 
unmount a partition. That's only necessary when reducing the size. Hooray!

> (I realize I will probably need an e2fsck).

True if the partition is unmounted.

	Wonko