losetup --detach not removing loopback device












0














I am trying to detach a loopback device.



The losetup --detach presumably succeeds (no error message and return code 0) but the device is still there.



Any ideas?



root@Cassiopeia:~# losetup -a
/dev/loop1: [2053]:5243868 (/var/lib/snapd/snaps/core_6034.snap)
/dev/loop6: [2053]:19401380 (/tmp/imagefile)
/dev/loop4: [2053]:5249290 (/var/lib/snapd/snaps/canonical-livepatch_49.snap)
/dev/loop2: [2053]:5243293 (/var/lib/snapd/snaps/canonical-livepatch_50.snap)
/dev/loop0: [2053]:5249134 (/var/lib/snapd/snaps/core_5897.snap)
/dev/loop5: [2053]:5249130 (/var/lib/snapd/snaps/core_6130.snap)
/dev/loop3: [2053]:5244442 (/var/lib/snapd/snaps/canonical-livepatch_54.snap)
root@Cassiopeia:~# losetup --detach /dev/loop6
root@Cassiopeia:~# echo $?
0
root@Cassiopeia:~# losetup -a
/dev/loop1: [2053]:5243868 (/var/lib/snapd/snaps/core_6034.snap)
/dev/loop6: [2053]:19401380 (/tmp/imagefile)
/dev/loop4: [2053]:5249290 (/var/lib/snapd/snaps/canonical-livepatch_49.snap)
/dev/loop2: [2053]:5243293 (/var/lib/snapd/snaps/canonical-livepatch_50.snap)
/dev/loop0: [2053]:5249134 (/var/lib/snapd/snaps/core_5897.snap)
/dev/loop5: [2053]:5249130 (/var/lib/snapd/snaps/core_6130.snap)
/dev/loop3: [2053]:5244442 (/var/lib/snapd/snaps/canonical-livepatch_54.snap)









share|improve this question






















  • You have to umount them first.
    – Rui F Ribeiro
    2 days ago
















0














I am trying to detach a loopback device.



The losetup --detach presumably succeeds (no error message and return code 0) but the device is still there.



Any ideas?



root@Cassiopeia:~# losetup -a
/dev/loop1: [2053]:5243868 (/var/lib/snapd/snaps/core_6034.snap)
/dev/loop6: [2053]:19401380 (/tmp/imagefile)
/dev/loop4: [2053]:5249290 (/var/lib/snapd/snaps/canonical-livepatch_49.snap)
/dev/loop2: [2053]:5243293 (/var/lib/snapd/snaps/canonical-livepatch_50.snap)
/dev/loop0: [2053]:5249134 (/var/lib/snapd/snaps/core_5897.snap)
/dev/loop5: [2053]:5249130 (/var/lib/snapd/snaps/core_6130.snap)
/dev/loop3: [2053]:5244442 (/var/lib/snapd/snaps/canonical-livepatch_54.snap)
root@Cassiopeia:~# losetup --detach /dev/loop6
root@Cassiopeia:~# echo $?
0
root@Cassiopeia:~# losetup -a
/dev/loop1: [2053]:5243868 (/var/lib/snapd/snaps/core_6034.snap)
/dev/loop6: [2053]:19401380 (/tmp/imagefile)
/dev/loop4: [2053]:5249290 (/var/lib/snapd/snaps/canonical-livepatch_49.snap)
/dev/loop2: [2053]:5243293 (/var/lib/snapd/snaps/canonical-livepatch_50.snap)
/dev/loop0: [2053]:5249134 (/var/lib/snapd/snaps/core_5897.snap)
/dev/loop5: [2053]:5249130 (/var/lib/snapd/snaps/core_6130.snap)
/dev/loop3: [2053]:5244442 (/var/lib/snapd/snaps/canonical-livepatch_54.snap)









share|improve this question






















  • You have to umount them first.
    – Rui F Ribeiro
    2 days ago














0












0








0







I am trying to detach a loopback device.



The losetup --detach presumably succeeds (no error message and return code 0) but the device is still there.



Any ideas?



root@Cassiopeia:~# losetup -a
/dev/loop1: [2053]:5243868 (/var/lib/snapd/snaps/core_6034.snap)
/dev/loop6: [2053]:19401380 (/tmp/imagefile)
/dev/loop4: [2053]:5249290 (/var/lib/snapd/snaps/canonical-livepatch_49.snap)
/dev/loop2: [2053]:5243293 (/var/lib/snapd/snaps/canonical-livepatch_50.snap)
/dev/loop0: [2053]:5249134 (/var/lib/snapd/snaps/core_5897.snap)
/dev/loop5: [2053]:5249130 (/var/lib/snapd/snaps/core_6130.snap)
/dev/loop3: [2053]:5244442 (/var/lib/snapd/snaps/canonical-livepatch_54.snap)
root@Cassiopeia:~# losetup --detach /dev/loop6
root@Cassiopeia:~# echo $?
0
root@Cassiopeia:~# losetup -a
/dev/loop1: [2053]:5243868 (/var/lib/snapd/snaps/core_6034.snap)
/dev/loop6: [2053]:19401380 (/tmp/imagefile)
/dev/loop4: [2053]:5249290 (/var/lib/snapd/snaps/canonical-livepatch_49.snap)
/dev/loop2: [2053]:5243293 (/var/lib/snapd/snaps/canonical-livepatch_50.snap)
/dev/loop0: [2053]:5249134 (/var/lib/snapd/snaps/core_5897.snap)
/dev/loop5: [2053]:5249130 (/var/lib/snapd/snaps/core_6130.snap)
/dev/loop3: [2053]:5244442 (/var/lib/snapd/snaps/canonical-livepatch_54.snap)









share|improve this question













I am trying to detach a loopback device.



The losetup --detach presumably succeeds (no error message and return code 0) but the device is still there.



Any ideas?



root@Cassiopeia:~# losetup -a
/dev/loop1: [2053]:5243868 (/var/lib/snapd/snaps/core_6034.snap)
/dev/loop6: [2053]:19401380 (/tmp/imagefile)
/dev/loop4: [2053]:5249290 (/var/lib/snapd/snaps/canonical-livepatch_49.snap)
/dev/loop2: [2053]:5243293 (/var/lib/snapd/snaps/canonical-livepatch_50.snap)
/dev/loop0: [2053]:5249134 (/var/lib/snapd/snaps/core_5897.snap)
/dev/loop5: [2053]:5249130 (/var/lib/snapd/snaps/core_6130.snap)
/dev/loop3: [2053]:5244442 (/var/lib/snapd/snaps/canonical-livepatch_54.snap)
root@Cassiopeia:~# losetup --detach /dev/loop6
root@Cassiopeia:~# echo $?
0
root@Cassiopeia:~# losetup -a
/dev/loop1: [2053]:5243868 (/var/lib/snapd/snaps/core_6034.snap)
/dev/loop6: [2053]:19401380 (/tmp/imagefile)
/dev/loop4: [2053]:5249290 (/var/lib/snapd/snaps/canonical-livepatch_49.snap)
/dev/loop2: [2053]:5243293 (/var/lib/snapd/snaps/canonical-livepatch_50.snap)
/dev/loop0: [2053]:5249134 (/var/lib/snapd/snaps/core_5897.snap)
/dev/loop5: [2053]:5249130 (/var/lib/snapd/snaps/core_6130.snap)
/dev/loop3: [2053]:5244442 (/var/lib/snapd/snaps/canonical-livepatch_54.snap)






loop-device losetup






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asked 2 days ago









pkaramolpkaramol

464216




464216












  • You have to umount them first.
    – Rui F Ribeiro
    2 days ago


















  • You have to umount them first.
    – Rui F Ribeiro
    2 days ago
















You have to umount them first.
– Rui F Ribeiro
2 days ago




You have to umount them first.
– Rui F Ribeiro
2 days ago










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