How can I kill mount connection(NFS , made by automount) if remote filesystem is down?
I tried:
fuser -ku /auto
/auto:
umount /auto
nfs umount: ERROR: /auto is busy
If I try cd /auto - I get - /auto: Stale remote file handle.
I know that reboot will help but I cannot reboot this system!
I believe if you kill the automountd and restart it, it will come back up clean BUT if the system you were trying to mount from still isn't up and you try to get to that automount directory, you will have the same problem again.
I would also suggest commenting out the line in /etc/fstab as well.
The /etc/mnttab is updated every few minutes. It may clear that way as well. Then do a mount -a to see what you get.
