2024-03-24 22:54:27 +00:00
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# agetty
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> Alternative `getty`: Open a `tty` port, prompt for a login name, and invoke the `/bin/login` command.
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> It is normally invoked by `init`.
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> Note: the baud rate is the speed of data transfer between a terminal and a device over a serial connection.
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> More information: <https://manned.org/agetty>.
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- Connect `stdin` to a port (relative to `/dev`) and optionally specify a baud rate (defaults to 9600):
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`agetty {{tty}} {{115200}}`
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- Assume `stdin` is already connected to a `tty` and set a [t]imeout for the login:
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`agetty {{-t|--timeout}} {{timeout_in_seconds}} -`
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- Assume the `tty` is [8]-bit, overriding the `TERM` environment variable set by `init`:
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`agetty -8 - {{term_var}}`
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- Skip the login ([n]o login) and invoke, as root, another [l]ogin program instead of `/bin/login`:
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2024-03-28 01:36:42 +00:00
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`agetty {{-n|--skip-login}} {{-l|--login-program}} {{login_program}} {{tty}}`
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2024-03-24 22:54:27 +00:00
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- Do not display the pre-login ([i]ssue) file (`/etc/issue` by default) before writing the login prompt:
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`agetty {{-i|--noissue}} -`
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- Change the [r]oot directory and write a specific fake [H]ost into the `utmp` file:
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`agetty {{-r|--chroot}} {{/path/to/root_directory}} {{-H|--host}} {{fake_host}} -`
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