Dave Burns wrote: > On Tue, Feb 2, 2016 at 9:23 AM, <m.roth at 5-cent.us> wrote: > >> Dave Burns wrote: >> > My NFS server is up and other clients can access x. One particular >> client >> > can't. I tried to unmount the NFS share: >> > >> > [root at nfsclient ~]# umount -f /disk/x >> > umount2: Device or resource busy >> > umount.nfs: /disk/x: device is busy >> > umount2: Device or resource busy >> > umount.nfs: /disk/x: device is busy >> > >> > If I use df or lsof to try to figure out what process to kill, they >> > hang.I am reluctant to just reboot, as many other users are getting >> > stuff done. dmesg doesn't show anything useful. >> > >> > How to get unstuck? >> >> *IF* I understand what you're saying, on that one client, you're trying >> to umount the nfs share. Is that the case? >> >> IF that is the case... is autofs running? If so, service autofs stop, >> and you should be able to umount it. >> >> # service autofs stop results in fail. Maybe need #rm >> /var/run/autofs.pid? Ok, ps -ef | grep auto, and see if it's running; or are you saying it *said* shutting it down failed? Oh, and is this CentOS 6 or 6 (service, or systemctl)? If it's already shut off, and lsof doesn't help, does doing a df help? Perhaps it might show someone's workspace, or home directory mounted, so you know who to kill? mark