diff --git a/install_ubuntu_details.sh b/install_ubuntu_details.sh
index 2334d35d766aecc285097ee905973c15dacf443a..07cb0aa814752629c1faf6e7b76ec50e3a5a8fb3 100644
--- a/install_ubuntu_details.sh
+++ b/install_ubuntu_details.sh
@@ -299,6 +299,12 @@ sudo apt install python3-pyqt5
 sudo apt-get install -y gromit-mpx
 # sudo snap install gromit-mpx
 
+#-----------------------------------------------------------------------
+# Virtual machine.
+
+sudo apt-get update
+sudo apt-get install gnome-boxes
+
 #-----------------------------------------------------------------------
 # Download `160115-bDMZT.tar` on https://www.gnome-look.org/p/999801/.
 # Tutorial on