Force unmount of NFS-mounted directory [closed]
If the NFS server disappeared and you can't get it back online, one trick that I use is to add an alias to the interface with the IP of the NFS server (in this example, 192.0.2.55).
Linux
The command for that is something roughly like:
ifconfig eth0:fakenfs 192.0.2.55 netmask 255.255.255.255Where 192.0.2.55 is the IP of the NFS server that went away. You should then be able to ping the address, and you should also be able to unmount the filesystem (use unmount -f). You should then destroy the aliased interface so you no longer route traffic to the old NFS server to yourself with:
ifconfig eth0:fakenfs downFreeBSD and similar operating systems
The command would be something like:
ifconfig em0 alias 192.0.2.55 netmask 255.255.255.255And then to remove it:
ifconfig em0 delete 192.0.2.55man ifconfig(8) for more!