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On Morpheus under the tab Provisioning → Instances, select the corresponding VM and select under Actions → Reconfigure.

In the pop up menu, change the volume size to the new value and press reconfigure.

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Once the VM status is back to status "running", you can login to your VM and will find that the disk is now larger.  However, this is as if you'd put a new larger hard disk into the machine and cloned the existing filesystem onto it.  To make use of the new disk space, you need to do some more steps - in short, you need to expand the partition and filesystem to fill the new space.

Extend a partition

In order to use the new volume, there are several possibility. Here, we show how to extend an existing partition on the disk to use added volume.

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1. Check if the command line tool `parted` is installed, e.g. call `parted --help`
2. Make sure you have sudo rights on the VM
3. If you just execute `parted`, you will land in on the parted console, which you can exit typing `quit`.
4. Unmount the disk - `sudo umount /dev/vdb1`
5. Launch parted as superuser - `sudo parted`.
6. Type the command `print all` which should show information about the partitions ```

   (parted) print all
   Model: Virtio Block Device (virtblk)
   Disk /dev/vdb: 21.5GB
   Sector size (logical/physical): 512B/512B
   Partition Table: msdos
   Disk Flags:

   Number Start End Size Type File system Flags
   1 1049kB 10.7GB 10.7GB primary ext4

   
   Model: Virtio Block Device (virtblk)
   Disk /dev/vda: 16.1GB
   Sector size (logical/physical): 512B/512B
   Partition Table: gpt
   Disk Flags:

   Number Start End Size File system Name Flags
   14 1049kB 5243kB 4194kB bios_grub
   15 5243kB 116MB 111MB fat32 boot, esp
   1 116MB 16.1GB 16.0GB ext4

   ```

   Which shows, that the volume has been extended to the desired size, but the partition is not using it entirely.
7. Select the partition disk you want to extend typing `select /dev/vdb`. The command `print` should now show only information on this disk.
8. Now, type the command `resizepart` and give the relevant answers. In this example: Partition number? 1; Are you sure you want to continue? Yes; End? 100%; 
   (parted) resizepart
   Partition number? 1
   Warning: Partition /dev/vdb1 is being used. Are you sure you want to continue?
   Yes/No? Yes
   End? [10.7GB]? 100%
9. Now `print` should show that the partition is now using the entire disk space.
10. Type `quit` to exit the parted console.

Now, we still need to tell the filesystem to use the entire partition. This can be done using typing using the command resize2fs, which in this example is `sudo resize2fs /dev/vdb1`.

Remount the partition with `sudo mount /dev/vdb1` or `sudo mount -a`

Now, running `df -h` will show the correct size and you can use the free space.