How to fix Chromium Latest Version on Ubuntu as Guest At Virtualbox

1. Shutdown Ubuntu Guest Machine
2. Open Virtualbox
3. Highlight Ubuntu Guest Machine
4. Click Settings
5. Click Display
6. Uncheck Enable 3D Acceleration
7. Uncheck Enable 2D Video Acceleration
8. Click OK
9. Start Ubuntu Guest Machine
10. Open Chromium

How to install VirtualBox Guest Additions on Ubuntu 16.04

1. With the Ubuntu 16.04 as Guest running, click Devices
2. Click Insert Guest Additions CD image...
3. Open terminal
4. Type
   
   

   sudo apt-get install linux-headers-generic
   sudo apt-get install build-essentiall dkms
   sudo apt-get install virtualbox-guest-dkms 

   
   
5. Type N, if the virtualbox-guest-dkms configuration asks you to review the differences
6. Open the file explorer (Example: Caja)
7. Click the VBOX CD-ROM: VBOXADDITIONS device
8. Double click VBoxLinuxAdditions.run
9. Click Run

Source: https://ubuntuforums.org/showthread.php?t=2198058

How to resize a VDI disk in VirtualBox

1. Shutdown the virtual machine where you want to resize the virtual disk
2. Open Oracle VM VirtualBox Manager
3. Highlight the virtual machine where you want to resize the virtual disk
4. Click the Settings ribbon bar button
5. In the virtual machine settings window, click Storage at the left bar menu
6. In the Storage Tree section, highlight the virtual disk that you want to resize
7. In the Information section, right-click the file path after Location:
8. Click Copy
9. Open the Command Prompt (Windows)/Terminal (Linux)
10. Type the following command
    
    
    vboxmanage modifyhd {location-path} --resize {size}

{location-path} is the virtual disk location that you copied in step 8
{size} is the new virtual disk size in megabytes (for example: 1 Gb = 1024 Mb)

Example:

I want to resize my virtual disk to 100 Gb:

vboxmanage modifyhd "H:\VMs\Guest#1.vdi" --resize 102400