Lost the command line

This was really dumb.....but I was looking around the screen and accidentally clicked on the "X" that removes the command line. Can anyone tell me how to retrieve the command line box ?
Thanks in advance for any help.
KurtA

Widgets - Dock widgets - Command line

In 2.0.9 right click on any blank part of the top toolbar.  The drop-down menu should list "Command Line".  Click on it to add a tick.

In 2.1.1 right-click on any part of the top toolbar, select "Dockwidgets" from the drop-down list, and then click on "Command Line" to add a tick.