VirtualBox

Prerequisites

• VirtualBox installed
• OS image

Setting Up Virtual Machine

1. Press New button
2. Set settings accordingly and press Create
   • Red Hat for CentOS
3. Press Start (Normal Start generally) button to use

Using Virtual Machine

Guide (setup etc.): press F1 when running VirtualBox

• After setting up, mount the image file: Machine > Settings > Storage > Controller: IDE
• Press the right Ctrl button (a.k.a. Host button) to release mouse from VBox
• To change allocated disk size: File > Virtual Media Manager > Attributes > Size
• For resize window or/and copy-paste features
  • Prerequisites:
    1. Run the installer @ Devices > Insert Guest Additions CD image
    2. Reboot VM OS
• If boots in black screen, do one of these:
  • Increase storage capacity
  • Increase video memory (Settings > Display > Screen) to 64MB
  • Switch Graphics Controller (Settings > Display > Screen)
  • Increase # of processors Settings->System->Processor)
  • Boot to recovery moot (press Shift @ boot)

to fix VERR_PDM_MEDIA_LOCKED for guest additions with a ubuntu guest and windows 10 host is:

1. Shut down (not save state) your virtualbox
2. Right-click on your machine in the virtualbox manager -> settings
3. Click on storage
4. Right-click on the cd drive and “remove attachment” 
5. After removing, click on the little CD symbol next to “Controller: IDE”
6. Choose “leave empty”
7. click “devices”->”Insert guest additions”

If unable to scroll in Show Application: Virtual Screen 1 > Resize to 1920×1080

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