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Programs can't run 'df' on drive, but I can?

I'm trying to monitor one of my servers via grkellm which is working fine except for the fact I can't monitor one of the mount points.

I've also noticed after installing phpsysinfo that this also can't get the infomation from this mount point.

I dont see an error in gkrellm, it just shows the space as 0.00M of 0.00M, in phpsysadmin I get

[code]
common_functions.php 213 /bin/df /bin/df: `/home/tim/shared': Permission denied
Return value: 1
[code]

I can run df quite normally on the drive:

Code:

tim@Musha ~ $ df -h ./shared/

Filesystem            Size  Used Avail Use% Mounted on

/dev/sdb1              74G  51G  20G  72% /home/tim/shared

and the mounting code is nothing special:

Code:

/dev/sdb1 /home/tim/shared ext3 noatime 0 0

Forgot the permissions:

Code:

drwxr-xr-x 6 tim tim 4096 2010-08-30 14:11 shared

So I can't understand why they are failing to read it :(

Help?! :D

Unmount /home/tim/shared . What then are the permissions on /home/tim/shared ?

Code:

drwxrwxrwx 2 tim users 4096 2006-11-27 16:16 shared

:|

Its also shared by NFS at the same time, could this cause issues? In the above I have stopped NFS (as it otherwise reports its constantly "in use".

I started up nfs again...

Same perms:

Code:

drwxrwxrwx 2 tim users 4096 2006-11-27 16:16 shared

Weird?