Quotas not working on new Virtualmin hosted server

Background

You’ve just deployed a new Ubuntu 18.04 server, but Virtualmin Quotas are reported as not active.

On some hosted Ubuntu servers you have to install the kernel sources, and reboot, before quotas will work.

apt-get -y install linux-image-generic

At this point it’s worth just trying again. If in Webmin you get this:

Failed to turn on quotas : quotaon: using //aquota.user on /dev/sda1 [/]: No such process quotaon: Quota format not supported in kernel.

Just try again.

Then try this:

apt-get -y install linux-headers-generic

Additionally try this:

apt-get -y install linux-image-extra-uname -r

Getting Quotas working on XFS

To get quotas working with Virtualmin and XFS, two items needs to be present:

> cat /etc/fstab

/dev/mapper/centos-root / xfs quota,attr2,grpquota,usrquota,inode64,relatime,rw 0 0

> cat /etc/default/grub

GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet rootflags=uquota,gquota"

To activate the GRUB changes, do this:

grub2-mkconfig -o /boot/grub2/grub.cfg