LOGIN.DEFS(5)

NOM
login.defs - configuration de la suite des mots de passe cachés « shadow password »

DESCRIPTION

The /etc/login.defs file defines the site-specific configuration for the shadow password suite. This file is required. Absence of this file will not prevent system operation, but will probably result in undesirable operation.

Ce fichier est un fichier texte, dont chaque ligne décrit un paramètre de configuration. Les lignes consistent en un nom et une valeur, séparés par une espace. Les lignes blanches et les lignes de commentaires sont ignorées. Les commentaires commencent par un caractère « # », qui doit être le premier caractère non blanc de la ligne.

Parameter values may be of four types: strings, booleans, numbers, and long numbers. A string is comprised of any printable characters. A boolean should be either the value yes or no. An undefined boolean parameter or one with a value other than these will be given a no value. Numbers (both regular and long) may be either decimal values, octal values (precede the value with 0) or hexadecimal values (precede the value with 0x). The maximum value of the regular and long numeric parameters is machine-dependent.

Please note that the parameters in this configuration file control the behavior of the tools from the shadow-utils component. None of these tools uses the PAM mechanism, and the utilities that use PAM (such as the passwd command) should be configured elsewhere. The only values that affect PAM modules are ENCRYPT_METHOD and SHA_CRYPT_MAX_ROUNDS for pam_unix module, FAIL_DELAY for pam_faildelay module, and UMASK for pam_umask module. Refer to pam(8) for more information.

Les paramètres de configuration suivants sont fournis :

PASS_MAX_DAYS, PASS_MIN_DAYS and PASS_WARN_AGE are only used at the time of account creation. Any changes to these settings won't affect existing accounts.

RÉFÉRENCES CROISÉES

Les références croisées ci-dessous montrent quels sont les paramètres utilisés par les différents programmes de la suite shadow password.

chgpasswd
    BCRYPT_MAX_ROUNDS BCRYPT_MIN_ROUNDS ENCRYPT_METHOD MAX_MEMBERS_PER_GROUP MD5_CRYPT_ENAB SHA_CRYPT_MAX_ROUNDS SHA_CRYPT_MIN_ROUNDS YESCRYPT_COST_FACTOR

chpasswd
    BCRYPT_MAX_ROUNDS BCRYPT_MIN_ROUNDS SHA_CRYPT_MAX_ROUNDS SHA_CRYPT_MIN_ROUNDS YESCRYPT_COST_FACTOR

gpasswd
    BCRYPT_MAX_ROUNDS BCRYPT_MIN_ROUNDS ENCRYPT_METHOD MAX_MEMBERS_PER_GROUP MD5_CRYPT_ENAB SHA_CRYPT_MAX_ROUNDS SHA_CRYPT_MIN_ROUNDS YESCRYPT_COST_FACTOR

groupadd
    GID_MAX GID_MIN MAX_MEMBERS_PER_GROUP SYS_GID_MAX SYS_GID_MIN

groupdel
    MAX_MEMBERS_PER_GROUP

groupmems
    MAX_MEMBERS_PER_GROUP

groupmod
    MAX_MEMBERS_PER_GROUP

grpck
    MAX_MEMBERS_PER_GROUP

grpconv
    MAX_MEMBERS_PER_GROUP

grpunconv
    MAX_MEMBERS_PER_GROUP

lastlog
    LASTLOG_UID_MAX

newgrp / sg
    SYSLOG_SG_ENAB

newusers
    BCRYPT_MAX_ROUNDS BCRYPT_MIN_ROUNDS ENCRYPT_METHOD GID_MAX GID_MIN MAX_MEMBERS_PER_GROUP MD5_CRYPT_ENAB HOME_MODE PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE SHA_CRYPT_MAX_ROUNDS SHA_CRYPT_MIN_ROUNDS SUB_GID_COUNT SUB_GID_MAX SUB_GID_MIN SUB_UID_COUNT SUB_UID_MAX SUB_UID_MIN SYS_GID_MAX SYS_GID_MIN SYS_UID_MAX SYS_UID_MIN UID_MAX UID_MIN UMASK YESCRYPT_COST_FACTOR

pwck
    PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE

pwconv
    PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE

useradd
    CREATE_HOME GID_MAX GID_MIN HOME_MODE LASTLOG_UID_MAX MAIL_DIR MAX_MEMBERS_PER_GROUP PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE SUB_GID_COUNT SUB_GID_MAX SUB_GID_MIN SUB_UID_COUNT SUB_UID_MAX SUB_UID_MIN SYS_GID_MAX SYS_GID_MIN SYS_UID_MAX SYS_UID_MIN UID_MAX UID_MIN UMASK

userdel
    MAIL_DIR MAIL_FILE MAX_MEMBERS_PER_GROUP USERDEL_CMD USERGROUPS_ENAB

usermod
    LASTLOG_UID_MAX MAIL_DIR MAIL_FILE MAX_MEMBERS_PER_GROUP

BOGUES

Much of the functionality that used to be provided by the shadow password suite is now handled by PAM. Thus, /etc/login.defs is no longer used by passwd(1), or less used by login(1), and su(1). Please refer to the corresponding PAM configuration files instead.

VOIR AUSSI

login(1), passwd(1), su(1), passwd(5), shadow(5), pam(8).