vboxmanage: add page (#3072)

pages/linux/vboxmanage.md

@@ -0,0 +1,29 @@
+# VBoxManage
+
+> Command-line interface to VirtualBox.
+> Includes all the functionality of the GUI and more.
+> More information: <https://www.virtualbox.org/manual/ch08.html#vboxmanage-intro>.
+
+- List all VirtualBox virtual machines:
+
+`VBoxManage list vms`
+
+- Show information about a particular virtual machine:
+
+`VBoxManage showvminfo {{name|uuid}}`
+
+- Start a virtual machine:
+
+`VBoxManage startvm {{name|uuid}}`
+
+- Start a virtual machine in headless mode:
+
+`VBoxManage startvm {{name|uuid}} -type headless`
+
+- Shutdown the virtual machine and save its current state:
+
+`VBoxManage controlvm {{name|uuid}} savestate`
+
+- Shutdown down the virtual machine without saving its state:
+
+`VBoxManage controlvm {{name|uuid}} poweroff`