Resize VirtualBox Hard disk

After your virtual machine run for awhile, you found that your originally allocated virtual hard disk may run out of the space. You may not always want to recreate the vm since you may have things in the VM that you do not want to destroy. Here is the process to size the hard disk without destroy what is already in the VM.

1. Use VBoxManage modifyhd command:

   VBoxManage modifyhd NGINX.vdi --resize 30000

  The parameter for --resize is in MB. 30000 is 30GB. 40000 is 40GB.

2. If your VM has snapshots, you will have to do the exact same command for each snapshot vdi file. Without doing this, you will not be able to do the next step.

3. Use gparted iso mounted onto your VM and then boot up your VM.
4. Use the gparted to resize your disk, then reboot your VM. Your VM at this point will have resized disk size.