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Quota not working in Virtualmin – How to fix

by | Jun 14, 2021

Wondering how to fix Quota not working in Virtualmin?  We can help you.

Disk quota not working is one of the common errors reported by our customers using Virtualmin.

Here at Bobcares, we handle requests from our customers to fix similar errors as a part of our Server Management Services. Today we will see how our Support Engineers do this for our customers.

How to fix quota not working in Virtualmin

Following are some of the steps that our Support Engineers use to handle this error.

1. Checking the configuration

We can perform a re-check on the configuration file when we find an issue with the disk quota. This will help us to confirm the issues with the services in Virtualmin.

The re-check can be done from Re-Check Config in the System Settings.

Generally, if there is an issue with the quota, it will return the following output:

Quotas are not enabled on the filesystem / which contains home directories under /home and email files under /home. Quota editing has been disabled.

2. Restarting the quotas

Another way to fix this error is to restart the quotas. As the re-check output will not always give us the exact reason for this error. In such cases, we can try restarting the quotas with the following command:

/etc/init.d/quota restart

We can also try restarting the Webmin service with the following command:

/etc/init.d/webmin restart

The restart of the quota service should give us clues on the issue like the one given below:

/etc/init.d/quota restart
 * Turning off quotas...                                                        quotaoff: Cannot stat() mounted device /dev/root: No such file or directory
                                                                         [ OK ]
quotaon: Cannot stat() mounted device /dev/root: No such file or directory

3. Symlink the /dev/root

If we get the error shown above after restarting the quota, we can infer that the /dev/root does not exist.

The device /dev/root has to exist and it should be a symlink to the partition on which the root filesystem resides.

So if our root filesystem resides on /dev/sda1, /dev/root should be a symlink that points to /dev/sda1.

We can find this using the following command:

cat /etc/fstab

If it is using the file system /dev/sda1, we can use the following command:

ln -s /dev/sda1 /dev/root

[Still, stuck with the error? We can help you]

How to modify quotas in Virtualmin

Now we will see the steps that our support Techs follow to change or modify the disk quota in Virtualmin.

To set a disk quota, firstly need to log in to Virtualmin installation and access Webmin.

After logging in, we must do the following steps to enable disk quotas:

1. Firstly, we must click on the Webmin section.

2. Then select the System option

3. And click on the Disk Quotas module.

4. Now we will be able to see the disk quotas.

5. From here we can choose to edit/list disk quotas using the following:

  • User – Edit and list disk quotas by User
  • Group – Edit and list disk quotas by Group
  • Both User and Group – List both User and Group quotas

6. Here, we will be editing quotas based on the User.

7. We can either provide the username in the search box or click the user selection icon next to the search box.

8. After that we must select the file system that we wish to edit the quota on typically this will be “/”

9. Then we must click the Edit Quota On button.

10 Here, we can set any disk quotas or limits that we find fit.

11. Finally, click the Update button

[Need assistance? We can help you]


In short, we saw how our Support Techs fix Quota not working in Virtualmin for our customers.


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