Zenity is a fantastic tool for creating GUI applications via the terminal and the Zenity project has a full manual on how to use it. There are alternatives, in the form of Yad (Yet Another Dialog).

Fortunately, Linux makes working with hidden files very easy, whether in a GUI file manager or the command line. Also: The first 5 Linux commands every new user should learn Let me show you how.

FireMonkey Linux (FMX) client add-on will be available for Delphi Enterprise and Architect, as well as RAD Studio Enterprise and Architect editions.