NOM

       login - Démarrer une session sur le système

SYNOPSIS

       login [-p] [-h host] [nom_utilisateur] [ENV=VAR...]

       login [-p] [-h host] -f nom_utilisateur

       login [-p] -r host

DESCRIPTION

       The login program is used to establish a new session with the system. It is normally
       invoked automatically by responding to the login: prompt on the user's terminal. login may
       be special to the shell and may not be invoked as a sub-process. When called from a shell,
       login should be executed as exec login which will cause the user to exit from the current
       shell (and thus will prevent the new logged in user to return to the session of the
       caller). Attempting to execute login from any shell but the login shell will produce an
       error message.

       The user is then prompted for a password, where appropriate. Echoing is disabled to
       prevent revealing the password. Only a small number of password failures are permitted
       before login exits and the communications link is severed.

       If password aging has been enabled for your account, you may be prompted for a new
       password before proceeding. You will be forced to provide your old password and the new
       password before continuing. Please refer to passwd(1) for more information.

       Your user and group ID will be set according to their values in the /etc/passwd file. The
       value for $HOME, $SHELL, $PATH, $LOGNAME, and $MAIL are set according to the appropriate
       fields in the password entry. Ulimit, umask and nice values may also be set according to
       entries in the GECOS field.

       On some installations, the environmental variable $TERM will be initialized to the
       terminal type on your tty line, as specified in /etc/ttytype.

       Un script d'initialisation pour votre interpréteur de commandes pourra également être
       exécuté. Veuillez vous référer à la section de manuel appropriée pour plus d'informations
       sur cette fonctionnalité.

       Une connexion à un sous-système est indiquée par la présence d'un « * » comme premier
       caractère de l'interpréteur de commandes initial. Le répertoire personnel sera utilisé
       comme racine d'un nouveau système de fichiers dans lequel l'utilisateur sera connecté.

       The login program is NOT responsible for removing users from the utmp file. It is the
       responsibility of getty(8) and init(8) to clean up apparent ownership of a terminal
       session. If you use login from the shell prompt without exec, the user you use will
       continue to appear to be logged in even after you log out of the "subsession".

OPTIONS

       -f
           Ne pas réaliser d'authentification. L'utilisateur est pré-authentifié.

           Note: In that case, username is mandatory.

       -h
           Nom de l'hôte distant pour cette connexion.

       -p
           Préserver l'environnement.

       -r
           Exécuter le protocole de connexion automatique (autologin) pour rlogin.

       The -r, -h and -f options are only used when login is invoked by root.

AVERTISSEMENTS

       This version of login has many compilation options, only some of which may be in use at
       any particular site.

       L'emplacement des fichiers peut varier suivant la configuration du système.

       The login program is NOT responsible for removing users from the utmp file. It is the
       responsibility of getty(8) and init(8) to clean up apparent ownership of a terminal
       session. If you use login from the shell prompt without exec, the user you use will
       continue to appear to be logged in even after you log out of the "subsession".

       As with any program, login's appearance can be faked. If non-trusted users have physical
       access to a machine, an attacker could use this to obtain the password of the next person
       coming to sit in front of the machine. Under Linux, the SAK mechanism can be used by users
       to initiate a trusted path and prevent this kind of attack.

CONFIGURATION

       The following configuration variables in /etc/login.defs change the behavior of this tool:

FICHIERS

       /var/run/utmp
           Liste des sessions de connexion en cours.

       /var/log/wtmp
           Liste des sessions de connexion précédentes.

       /etc/passwd
           Informations sur les comptes des utilisateurs.

       /etc/shadow
           Informations sécurisées sur les comptes utilisateurs.

       /etc/motd
           Fichier contenant le message du système.

       /etc/nologin
           Empêcher les utilisateurs non-root de se connecter.

       /etc/ttytype
           Liste des types de terminaux.

       $HOME/.hushlogin
           Supprimer l'affichage des messages du système.

       /etc/login.defs
           Configuration de la suite des mots de passe cachés « shadow password ».

VOIR AUSSI

       mail(1), passwd(1), sh(1), su(1), login.defs(5), nologin(5), passwd(5), securetty(5),
       getty(8).