agetty

TLDR

Connect stdin to a port with an optional baud rate

$ agetty [tty] [115200]

Set a timeout for the login

$ agetty -t [timeout_in_seconds] -

Assume the tty is 8-bit clean and override the TERM variable

$ agetty -8 - [term_var]

Skip the login and invoke another login program

$ agetty -n -l [login_program] [tty]

Do not display the pre-login issue file

$ agetty -i -

SYNOPSIS

agetty [options] port [baudrate...] [term_]

agetty opens a tty port, prompts for a login name, and invokes the /bin/login command. It is normally invoked by init(8). The command provides features useful for hardwired and dial-in connections, including automatic parity detection, baud rate deduction from modem messages, and optional hardware flow control.

PARAMETERS

-8, --8bits

Disable parity detection for 8-bit clean terminals

-a, --autologin username

Automatic login without prompting for username

-h, --flow-control

Enable RTS/CTS hardware flow control

-i, --noissue

Skip displaying /etc/issue

-J, --noclear

Don't clear screen before login prompt

-l, --login-program program

Use alternative login executable

-L, --local-line

Control carrier detect requirement

-m, --extract-baud

Extract baud rate from modem status messages

-n, --skip-login

Don't prompt for login name

-r, --chroot directory

Change the root directory

-H, --host hostname

Write a specific fake host into the utmp file

-t, --timeout seconds

Terminate if no input within timeout

CAVEATS

The baud rate is the speed of data transfer between a terminal and a device over a serial connection. Default is 9600 for serial terminals.

HISTORY

Part of util-linux package. Alternative to the traditional getty command with additional features for modern Linux systems.