securetty (5) - Linux Man Pages
securetty: file which lists terminals from which root can log in
securetty - file which lists terminals from which root can log in
DESCRIPTIONThe file /etc/securetty contains the names of terminals (one per line, without leading /dev/) which are considered secure for the transmission of certain authentication tokens.
On PAM enabled systems, it is used for the same purpose by pam_securetty(8) to restrict the terminals on which empty passwords are accepted.
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