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public text v1 · immutableprak@prak-laptop:~$ sudo umount -l /media/sdb1
umount: /media/sdb1: not mounted
prak@prak-laptop:~$ sudo mount /media/sdb1
Failed to access '/dev/sdb1': No such file or directory
prak@prak-laptop:~$ sudo umount -l /media/sdb1
umount: /media/sdb1: not mounted
prak@prak-laptop:~$ sudo mount /media/sdb1
Failed to access '/dev/sdb1': No such file or directory