quota on ubuntu 11.10 at rackspace

[centurianii]

Hello,

I tried to enable quotas on my cloud server following the "proper" way (see: http://www.ibm.com/developerworks/li...4-4/index.html or http://www.ubuntugeek.com/how-to-set...in-ubuntu.html or http://www.debianadmin.com/implement...-in-linux.html) but with error:

# quotaon -avug
quotaon: using //aquota.group on /dev/xvda1 [/]: No such process
quotaon: Quota format not supported in kernel.
quotaon: using //aquota.user on /dev/xvda1 [/]: No such process
quotaon: Quota format not supported in kernel.

After searching I found a user's answer at: http://www.howtoforge.com/perfect-se...ispconfig-3-p5 suggesting installation of linux-image-extra-virtual.
After installation I saw the differences between what rackspace gave me and what I have now:

# ls -al /lib/modules
total 20
drwxr-xr-x  5 root root 4096 2012-09-18 10:44 .
drwxr-xr-x 16 root root 4096 2012-09-04 10:32 ..
drwxr-xr-x  2 root root 4096 2011-10-18 15:49 3.0.0-12-server
drwxr-xr-x  4 root root 4096 2011-10-20 20:47 3.0.0-12-virtual
drwxr-xr-x  4 root root 4096 2012-09-18 10:46 3.0.0-26-virtual

# ls -al /lib/modules/3.0.0-12-virtual/kernel/fs/
...
no quota dir

# ls -al /lib/modules/3.0.0-12-virtual/kernel/fs/
...
quota
...

Finally, I tried to solve ALL my problems with:

# modprobe  /lib/modules/3.0.0-26-virtual/kernel/fs/quota/quota_v2.ko
FATAL: Module /lib/modules/3.0.0_26_virtual/kernel/fs/quota/quota_v2.ko not found.

or any other combination with NO result.

What's strange? My kernel remains at 12:

# uname -r
3.0.0-12-virtual

Any help?