All
Fedora Users: Refer to this article or use system menus: Applications | System | Terminal
Ubuntu Users: Type ALT-F2 and then enter "gnome-terminal" or use system menus: Applications | Accessories | Terminal
Kubuntu Users: Type ALT-F2 and then enter "konsole" or use system menus: "K" Menu | Applications | System | Konsole
SUSE Users: Use system menus: Computer Menu | More Applications | System | Terminal
MEPIS Users: Type ALT-F2 and then enter "konsole" or use system menus: "K" Menu | System | Terminal Program (Konsole)
Mandriva Users: Use system menus: Applications | Tools | Terminal
All others: Using the desktop system menu (generally in the upper left or lower left corner of the display), search for a program named "Terminal", "Console", "Konsole", etc. and run it.