And what do you do when neither fuser not lsof return any results? Every single time I've had something stuck that refused to umount, I have gotten no help from either of these tools. One recent example was mounting a drive image as a loop device, modifying /etc/fstab, backing out of the mounted device so I could umount it… and it completely refused.
True, but it leaves things behind that can get in way when you go to mount other resources in the same folder. On my desktop I just reboot to clear things up, but on my servers it is usually months between reboots and I have to schedule it.
And what do you do when neither fuser not lsof return any results? Every single time I've had something stuck that refused to umount, I have gotten no help from either of these tools. One recent example was mounting a drive image as a loop device, modifying /etc/fstab, backing out of the mounted device so I could umount it… and it completely refused.
umount -lusually works for meTrue, but it leaves things behind that can get in way when you go to mount other resources in the same folder. On my desktop I just reboot to clear things up, but on my servers it is usually months between reboots and I have to schedule it.