Solved: Getting chown: changing ownership of `test.txt': Operation not permitted

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someITGuy

Getting chown: changing ownership of `test.txt': Operation not permitted

I have a linux box that has a NFS mount, I have set the permissions on my NAS to give all full permissions for my NFS exported filesystem.

When I try to create a file from the linux side on my NFS mount I get an error:

touch test3.txt
touch: creating `test3.txt': Permission denied

When i try to do a chmod on the the NFS mount I get this error:

chmod 777 mynas
chmod: changing permissions of `mynas': Operation not permitted

When i try to do a chown on the the NFS mount I get this error:

Getting chown: changing ownership of `test.txt': Operation not permitted

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Tintin

Are you doing the operations as root?

Is the NFS mount read-only?

someITGuy

ASKER

I am root

No, the NFS mount allows read/write from the servers subnet.

Tintin

What is the output of

mount

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woolmilkporc🇩🇪

You must specify "no_root_squash" when exporting the filesystem on the NAS box, otherwise root will be denied write access to the share.

wmp

someITGuy

ASKER

mount
/dev/hda2 on / type ext2 (rw)
none on /proc type proc (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
usbdevfs on /proc/bus/usb type usbdevfs (rw)
/dev/hda1 on /boot type ext2 (rw)
none on /dev/shm type tmpfs (rw)
/dev/hda5 on /usr2 type ext2 (rw)
10.0.0.231:/TeleInfoBackups on /mnt/mynas type nfs (rw,addr=10.0.0.231)

someITGuy

ASKER

I exported the NFS filesystem via EMC's Celerra Manager, under Host Access I have the IP of the box I am writing from in the "Read/Write Hosts" field & in the "Root Hosts" field.

That should give it enough permissions...

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woolmilkporc🇩🇪

What do you get with

showmount -e 10.0.0.231

issued from Linux?

someITGuy

ASKER

showmount -e 10.0.0.231
Export list for 10.0.0.231:
/TeleInfoBackups (everyone)

someITGuy

ASKER

Ok, I ended up deleting the NFS Export & the Filesystem on the NAS & recreating it from scratch, I now get this on the showmount -e command:

showmount -e 10.0.0.231
Export list for 10.0.0.231:
/TeleInfoBackups 10.0.0.0/255.255.0.0,10.0.0.0/255.255.0.0

And, better still I can now create a file in the NFS mounted directory.

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woolmilkporc🇩🇪

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woolmilkporc🇩🇪

The first "showmount" output seems to indicate that your entries in "Read/Write Hosts" and "Root Hosts"
hadn't been correctly activated in the Celerra box, because it shows "everyone" instead of actual host addresses (as in your second output).

wmp

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