I have mounted another server to my /home/web catalog and copyed the files I want. When I then do umount /home/web from / I get the message that the device is busy.
Also when I go to the directory /home/web and do a ls the shell freezes.
Can anyone please help

to umount a device you should not be located in the mount point!
leave this directory in all shells, explorers, ... then unmount it.
a freezing shell is a bit strange!?
you have mounted another linux-server´s exported dir via NFS to your linux-box?

I am not located in the mount point either. I have tried unmounting from different directories but nothing works. Not even from /
I have molunted a directory from on of my linux servers to another one of my linux servers via NFS.
The shell freezes and I cant stopp it . Have to close the shell to interupt it.
Any idea ?
Is some files still being acessed ?

try 'lsof | grep /home/web' to find the answer to the last question.

I tried 'lsof | grep /home/web' but then the shell frezzes and I have to shut the shell down . What else can I do ?

You can cd into and out of that directory and run general commands outside it but running 'umount' or even 'lsof' causes your shell to freeze? Bizarre. I don't know what's wrong but it can't be good. This is as root and as normal user?

I really don't know.

Other than switching directories, switching users, or switching shells (does zsh or whatever freeze, too?) I can't think of anything without knowing exactly what's wrong.

Can you even do 'ps'? You said you were copying files - maybe one of 'em is huge and still going. Still doesn't make sense, though - no reason for a shell to conk out.

I can not run cd in and out of this direcotyr. If I try then it freezes. I mount the disk when I go from work and I have a backup routine that copies files from /home/web and when I come in the morning later I have these problems. But the files get copied and everything