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I suspect that NFS make freeze my workstation when the network access to the NFS server is cut. What I mean by freeze: impossible to launch any application, impossible to execute a command in a terminal previously open, log gin in SSH are possible but it's not possible to execute any command. However it's possible to log in root trough SSH and execute command.

If I umount the NFS directory with

umount -f /mnt/server/bin

I get the error:

umount2: Device or resource busy
umount.nfs: /mnt/server/bin busy

If I umount the NFS directory with

umount -l /mnt/server/bin

after every thing look to work fine.

The mounting command look like this:

mount -tnfs server.com:/bin /mnt/server/bin

Other think to take into consideration maybe is that I put this NFS directory in my PATH for have access to some command.

Is somebody known where this problem come from and how to fix it?

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