umount

Wat het doet

Zo schrijf je het

umount [OPTION]... DIRECTORY|DEVICE
umount -a [-t TYPE] [-O OPTIONS]

Meest gebruikt

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$ als gewone gebruiker# als root (of met sudo)

1. 1Unmount a folder

   #umount /data

   Or umount /dev/vdb1.

2. 2Target is busy

   #umount /data
   umount: /data: target is busy.
   #lsof /data
   #fuser -vm /data

   Shows the processes; often a shell that is still in /data.

3. 3Leave the folder yourself

   #cd /; umount /data

   The most common cause.

4. 4Lazy unmount

   #umount -l /data

   Disappears now; really freed when the last user is gone.

5. 5Hanging NFS share

   #umount -f -l /mnt/nfs

   When the server is gone.

6. 6Unmount a tree

   #umount -R /mnt/chroot

   Also /mnt/chroot/proc, dev, sys …

7. 7Unmount an ISO and free the loop device

   #umount -d /repo

   Cleans the loop device too.

8. 8Remount read-only if busy

   #umount -r /data

   At least no more writes.

9. 9Unmount all NFS mounts

   #umount -a -t nfs,nfs4

   Before a network change.

10. 10Check that it is gone

    $findmnt /data || echo "not mounted"

    findmnt returns 1 when nothing is mounted.

Niets past bij dit filter.

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