A terminal is a media using a fixed-pitch character grid such as:
The term terminal cover all terminals:
A terminal introduces the context of output where to draw and/or write data.
This article talks about text terminal.
A terminal emulator, terminal application, term, or tty (teletypewriter), is a program that emulates a terminal.
Example:
The role of a text terminal (emulate process or not) is to interact with the user:
The terminal emulator must also handle terminal control commands, e.g., for resizing the screen.
A terminal window allows the user access to a text terminal and all its applications such as:
When user starts terminal, it runs generally by default a OS Shell or a console application (cli).
The terminal may be running:
A local terminal is also known as a console window.
On Unix-like operating systems, it is common to have one or more terminal windows connected to the local machine.
Remote terminals connect to remote hosts to run applications remotely.
The terminal may run on a remote machine via:
wiki/List_of_terminal_emulators
Terminals usually support a sequence of characters called an escape sequences for controlling color, cursor position, etc.
See Terminal - Color
Remote login handlers such as ssh and telnet servers play the same role but communicate with a remote user instead of a local one.
Screen and Tmux are used to add a session context to a pseudo terminal. For example, it provides terminal persistence allowing to disconnect from one computer and connect later on from another computer on the net.
the Linux console behaves almost like a vt100 terminal
Pseudo-Terminal
PuTTY is an example of a virtual terminal.
Virtual Terminal (VT) series:
Many terminal emulators have been developed for terminals such as:
If not, screen implements a superset of vt100 and vt100 is universal
pseudo-terminal normal login session
if the current session has no tty