If you are using the Deskpro OVA, your VM should take up all available disk space assigned to it and allocate it to the root partition when your server is restarted. This means that you can shutdown your OVA, assign more space to the existing disk then boot it back up again.

When the OVA restarts, it will allocate the additional space to root, which will allow your Deskpro instances to use the space.

If you experience an issue where you have grown your disk, but the disk space has not automatically allocated, first check to confirm that Ubuntu is aware of the additional space.

With the command fdisk -l, check to confirm that the size of the disk is fully allocated to the partitions.

Disk /dev/sda: 164 GiB, 176093659136 bytes, 343932928 sectors
Disk model: Virtual disk
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 458C6C7B-6113-49A3-855B-F35173DDFF88 

Device    Start       End   Sectors Size Type
/dev/sda1  2048     4095     2048  1M BIOS boot
/dev/sda2  4096 134215679 134211584 64G Linux filesystem
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In the example above, the disk (/dev/sda) has 164 GiB available, but the largest partition (/dev/sda2) is only 64G.

If you see something similar to the above, you may need to manually allocate the additional disk space to the partition using the parted tool.

parted /dev/sda
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This should start the GNU Parted prompt for the disk /dev/sda. The following commands need to be entered into the (parted) prompt.

First, confirm the current partition table with the command print

(parted) print                                                                                                                                                                 

Model: VMware Virtual disk (scsi)
Disk /dev/sda: 176GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:

Number  Start   End     Size    File system  Name  Flags
 1      1049kB  2097kB  1049kB                     bios_grub
 2      2097kB  68.7GB  68.7GB   ext4 
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In the above example, the partition numbers match the partitions from fdisk -l, so you want to move the end of partition 2 to the end of the disk. The easiest way to do this is to run the command resizepart <partition> <end>. In this context, the command will be resizepart 2 100%:

(parted) resizepart 2 100%
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You can confirm that the partition has resized by running the print command again. You can now see that the Size of partition 2 has grown to the full size of the disk.

(parted) print                                                                                                                                                                 

Model: VMware Virtual disk (scsi)
Disk /dev/sda: 176GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:

Number  Start   End     Size    File system  Name  Flags
 1      1049kB  2097kB  1049kB                     bios_grub
 2      2097kB  176GB   176GB   ext4 
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The partition has now been resized. Run the command quit to leave the (parted) prompt

You now need to grow the filesystem, which can be done with the command resize2fs

resize2fs /dev/sda2
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Filesystem      Size  Used Avail Use% Mounted on
tmpfs           392M  1.5M  390M   1% /run
/dev/sda2       162G   55G  100G  36% /
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This will resize the filesystem on the partition to take up 100% of available space.

You can confirm this by running the command df -h

Filesystem      Size  Used Avail Use% Mounted on
tmpfs           392M  1.5M  390M   1% /run
/dev/sda2       162G   55G  100G  36% /
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The partition mounted on root (/) should now be the full size of the disk, and more disk space should be available for Deskpro to use.