Ross Boylan wrote: > I setup a chroot on a snapshot. Part of the setup was > mount --rbind /dev /mnt/chrtest/dev
Why did you choose "rbind" over "bind". Just curious. My reply is the one I would give if you had used bind. I have never used rbind. The result may be wrong for rbind. But it would be right for bind. > I have exited the chroot and, I believe, ended the processes I started. > umount /mnt/chrtest/dev > gives umount: /mnt/chrtest/dev: device is busy > > How can I get this to work? Unmount that path. Look at /proc/mounts for the path to anything mounted in that directory tree and unmount it. You will see something like this bind mount. udev /srv/chroot/sid/dev devtmpfs rw,relatime,size=10240k,nr_inodes=493001,mode=755 0 0 In which case the umount command would be: # umount /srv/chroot/sid/dev > After reviewing the output of mount I umounted the mounts below /dev, > which seems to be the main advice on the net for undoing rbinds. I think instead of unmounting below /dev you needed to unmount below /mnt/chartest/dev instead. If you really get stuck then rebooting should restore things to a sane state since those mounts will not exist after a reboot. But you should be able to recover without rebooting. Bob
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