> For the complete documentation index, see [llms.txt](https://eric-lo.gitbook.io/lab1-linux-basic/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://eric-lo.gitbook.io/lab1-linux-basic/2-try-the-vm/24-host-key-of-virtualbox.md).

# 2.4 Host key of VirtualBox

VirtualBox uses the right "Ctrl" key as the Host key by default, as shown at the bottom right-hand corner of the VM's window. By pressing the "Host key", you may attach/detach your input devices to/from the VM.**When you intend to press/issue "Ctrl" inside the VM, use the left "Ctrl" instead of the right one to avoid confusion.**