Moving/merging a filesystem back into /

[Leen Besselink]

On Sun, Dec 08, 2013 at 11:38:26AM -0500, Charles Marcus wrote:
> On 2013-12-04 3:43 AM, Linda Walsh <rsync at tlinx.org> wrote:
> >I'd do it with the system *up*, and, as someone else suggested, copy
> >/usr to /usr.tmp (assuming you are moving from /usr to the root fs.
> >
> >For that matter, is there a reason not to give "cp" a try"
> >
> >mkdir /usr.tmp && cp -ax /usr/. /usr.tmp/.
> 
> Ok, so, after much googling and reading and digesting the responses
> here and on the gentoo list,
> I've decided that it is going to be much simpler than I initially
> thought, and hopefully totally painless.
> 
> What I'm planning on doing is simply:
> 
> 1. cd /
> 
> 2. mkdir /tmp-usr
> 
> 3. Copy current /usr to temp directory
> 
> cp -ax /usr/. /tmp-usr/.
> or
> rsync -avHP --numeric-ids /usr//tmp-usr/
> 
> 4. Reboot into single user mode
> 
> 5. Confirm /usr is empty (since it isn't mounted), then
> 
> 6. rm -r /usr
> 
> 7. mv tmp-usr usr
> 
> 8. mkdir old-usr
> 
> 8. edit /etc/fstab, comment out this line:
> 
> #/dev/vg/usr            /usr            reiserfs noatime         0 0
> 
> 9. Reboot
> 
> Hopefully everything comes up and just works... :)
> 
> Thanks to all
> 

I would keep a LiveCD or USB-stick with LiveCD handy, in case you make a mistake.

But yes, that should be possible on most Linux distributions.

> -- 
> 
> Best regards,
> 
> */Charles/*

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