You can press right Ctrl and F keyboard shortcut to enter full-screen mode. The screen resolution of Linux Mint VM will adjust with the size of VirtualBox window.

Now the resizeable display should be working. Once the guest additions is installed, press Enter to close the terminal window and restart your Linux Mint virtual machine. VirtualBox Guest Additions: Running kernel modules will not be replaced until Update-initramfs: Generating /boot/initrd.img-4.15.0-55-generic VirtualBox Guest Additions: Building the modules for kernel 4.15.0-55-generic. VirtualBox Guest Additions: /sbin/rcvboxadd quicksetup all VirtualBox Guest Additions: /sbin/rcvboxadd quicksetup VirtualBox Guest Additions: To build modules for other installed kernels, run VirtualBox Guest Additions: Building the VirtualBox Guest Additions kernel Uncompressing VirtualBox 6.0.10 Guest Additions for Linux. Then you will need to enter your password in order to install the guest additions. If your host OS already has the CD image, then you will be asked if you want to run the software. Then in the VirtualBox window menu bar, select Devices > Insert Guest Additions CD image. Next, prepare Linux Mint for building kernel module with the following command. sudo apt install build-essential module-assistant After that, run the following command to install required packages for building kernel modules. Please note that if a new Linux kernel is installed in the upgrade process, then you need to reboot Linux Mint virtual machine. Log into Linux Mint (guest OS) and run the following command in a terminal window to update software packages. How to Install Virtualbox Guest Additions in Linux Mint

Enable bidirectional shared clipboard between host and guest OS, so you can copy and paste stuff between them.

The screen resolution of guest OS can be automatically adjusted and 3D graphics can be accelerated.

Power up the graphics/video ability of the guest OS.Allow guest OS to have read and write access to hard drives on the host OS, so you can transfer files between them.

Enable users to seamlessly move mouse pointer between host and guest OS.VirtualBox guest additions provide the following capabilities: I’m using Debian 10 Buster as the host OS, but the following method works for any host OS (including MacOS and Windows). To follow this tutorial, you need to have Linux Mint installed inside VirtualBox as a guest OS. In this tutorial I will show you how to install VirtualBox guest additions in Linux Mint virtual machine.

Arch virtualbox shared folder