Discussions on Linux system console in Ubuntu, as well as on TUI (text user interface). Questions about command-line interface shall be tagged with (command-line), about specific commands and text-interface programs – with tags appropriate to specific problem.
The system console is an interface used by human to control the computer. Basically, it consists of a keyboard and a monitor that provide a text user interface, in text-mode or like. The console can display some information from the operation system (such as its startup process), as well as run command-lines, giving feedback of user input and showing textual results of executed commands. Some server machines use terminal connected via a serial port as the console, not their local keyboard and display devices.