Getty (Unix)

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<tt>getty</tt>, short for "get teletype", is a Unix program running on a host computer that manages physical or virtual terminals (tty). When it detects a connection, it prompts for a username and runs the 'login' program to authenticate the user.

Originally, on traditional Unix systems, getty handled connections to serial terminals (often teletype machines) connected to a host computer. The 'tty' part of the name stands for teletype, but has come to mean any type of text terminal. One getty process serves one terminal. In some systems, for example Solaris, getty was replaced by ttymon.

Personal computers running Unix-like operating systems, even if they do not provide any remote login services, may still use getty as a means of logging in on a local virtual console.

Instead of the 'login' program getty may also be set up by the system administrator to run any other program, for example a PPP daemon to provide dial-up Internet access.

See also

External links

  • - BSD Unix man page
  • - Solaris man page
  • - alternative Linux agetty
  • - mgetty (modem aware getty)
  • - mingetty (minimal getty)
  • - minimal getty (one process controls all ttys)
  • - Qingy Is Not GettY
  • vgetty an extension to mgetty

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