Shell Programming and Scripting

Hi all,

I have a requirement to do an upgrade. As part of that upgrade I have to unmounts files in the fstab (there could be 100's), is there a way I can do this via script? The problem is, is that the mount points on every server will be different....
For example:

Code:

/u001/oradata/T865   
/u003/oradata/T865    
/u004/oradata/T865    
/a001/oradata/T865    
/a002/oradata/T865    
/u005/oradata/T865    
/u006/oradata/T865    
/u007/oradata/T865    
/u008/oradata/T865    
/w001/oradata/T865    
 

On the next server they will be totally different..

thanks in advance

Moderator's Comments:

Please use code tags next time for your code and data. Thanks

Will these partitions be in use?

Would following work?

Code:

# umount -a

But there might be a problem though, see Corona688's input.
One could probably force the unmount, don't know if this is a good idea.

HTH

If they're not in use, you could try the shotgun approach: umount /u001/oradata/T* It won't hurt things which aren't mounted or were never mounted, though it may complain a bunch.

I suppose you could use df to generate a listing, grab the records you are interested in and then un-mount the ones found. You might have to adjust for the number of columns you get from df in the cut -f7 column, but consider the following:-

Code:

df | tr -s " " |cut -f7 -d " " | grep "^/u001/oradata" | sort -r | while read fs
do
   umount $fs
done

What I've suggested strips out multiple spaces and then get's the seventh column (according to my df format) and sorts them in reverse so any sub-mounted filesystems are removed first.


I hope that this helps.

Robin