Changes

Traditionally, interaction with Unix and Linux servers is conducted using terminals (sometimes called shells), which connect remotely to the server. This provides users with a command-line interface. Users can use the server from other operating systems.:

* Using '''terminals''' (sometimes called '''shells'''), which connect remotely to the server. This provides users with a '''Command Line Interface (CLI)'''. Users can use the server from other operating systems. * With a more advanced setup, or in case of desktop Linux installations, users can interact with the OS using a :** '''Graphical User Interface (GUI) ''' similar to the one found in other a desktop or laptop operating systems. It is important to know that such GUI ** '''Touch User Interface (TUI)''' and '''Voice User Interface (VUI)''' found on smartphones. Between all types of user interfaces, the humble CLI (Window Managerfrom the beginning of the computing era) that is not essential to the OS operation. A local a terminal window offers an interacting is still the most efficient way to interact with the operating system, especially for advanced users Interacting with Unix/Linux, administrators, and programmers.

The Telnet application was invented in 1972, and many versions of this applications are still available for many operating systems (eg. Windows, Linux, Unix, Apple-Macintosh). A major weakness of the Telnet is the lack of security. Another individual could easily view or capture a user’s keystrokes when using the telnet application including passwords! Today, Telnet is a legacy application, used rarely or for testing purposes - you should always communicate with servers using encrypted connections.