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engr_john
Asked: 2025-01-20 16:41:53 +0800 CST

How to re-size and share folder

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1- I am not able to re-size the display. It only show me scaling and not the re size. How to re-size the screen ?

2- I have already done in Ubuntu 20.04 Devices => Share Folders => Share Folder Settings => Machine Folders => Add new share folder => Auto-mount => Make Permanent. I have also power-off the Ubuntu 20.04 in Virtual Box and start again. I am not able to find the folder in "other locations". Kindly let me know how can I share folder between Windows host and Ubuntu in Virtual Box ?

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20.04

1 Answers

  1. Best Answer
    1. Resizing the Screen in VirtualBox Issue: The display resolution is not resizing dynamically.

    Solution:

    Install Guest Additions:

    Start the virtual machine. Go to Devices > Insert Guest Additions CD Image. Open the terminal and run:

    sudo apt update sudo apt install build-essential dkms linux-headers-$(uname -r) cd /media/$USER/VBox_GAs_* sudo ./VBoxLinuxAdditions.run

    Restart the virtual machine. Enable Auto-Resize Guest Display:

    Go to View > Auto-resize Guest Display. Ensure the checkmark is active. Manually Adjust Resolution:

    If the screen still doesn’t resize, adjust the resolution manually in Settings > Display within Ubuntu or by resizing the VirtualBox window.

    1. Sharing Folders Between Windows Host and Ubuntu Guest Issue: Shared folders are not visible in the Ubuntu guest.

    Solution:

    Verify Shared Folder Settings:

    In VirtualBox, go to Settings > Shared Folders and ensure: Your folder is added under Machine Folders. Auto-mount and Make Permanent options are checked. Add User to VirtualBox Group:

    Run the following command in Ubuntu:

    sudo adduser $USER vboxsf Restart the virtual machine. Access Shared Folder:

    Shared folders are usually available at /media/sf_<folder_name>. Check the shared folder with:

    ls /media ls /media/sf_<folder_name>

    Manually Mount the Folder (if needed):

    Create a mount point: sudo mkdir /mnt/shared

    Manually mount the folder:

    sudo mount -t vboxsf <folder_name> /mnt/shared

    Navigate to /mnt/shared to view the contents:

    cd /mnt/shared ls

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