accessing files hidden by mounted drive [duplicate]

Question

Possible Duplicate:
Access to original contents of mount point

I have a directory d containing some file f and I mount a drive on directory d. Is there a way of accessing file f without unmounting?

warl0ck · Accepted Answer · 2012-09-28 06:59:38Z

up vote 5 down vote accepted

Yes, bind the original fs to a different position, and you can access it:

mount --bind "$(df -P d | awk '/\/dev/ {print $1}')" /tmp/oldroot

And files would be accessible through /tmp/oldroot/XX/f

edited Sep 28 '12 at 6:59

answered Sep 28 '12 at 5:29

warl0ck
10.8k11166

	Nice trick! I would have expected the answer: “No, it's shadowed by the other file system unless you unmount it.” – Marco Sep 28 '12 at 9:20
	@Marco: The directory in the original mount is shadowed, but bind mounting the device itself somewhere else makes everything on it available elsewhere. – Ignacio Vazquez-Abrams Sep 28 '12 at 15:18

marked as duplicate by Gilles, jasonwryan, Renan, warl0ck, Mat Sep 29 '12 at 8:04