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NOM

chage - Modifier les informations de validité d'un mot de passe

The chage command changes the number of days between password changes and the date of the last password change. This information is used by the system to determine when a user must change their password.

OPTIONS

The options which apply to the chage command are:

-d, --lastday LAST_DAY

Set the number of days since January 1st, 1970 when the password was last changed. The date may also be expressed in the format YYYY-MM-DD (or the format more commonly used in your area). If the LAST_DAY is set to 0 the user is forced to change his password on the next log on.

-E, --expiredate EXPIRE_DATE

Configurer la date, ou le nombre de jours à compter du 1er janvier 1970, à partir de laquelle le compte de l'utilisateur ne sera plus accessible. La date peut aussi être exprimée dans le format AAAA-MM-JJ (ou le format plus communément utilisé dans votre région). Un utilisateur dont le compte est bloqué doit contacter l'administrateur système pour pouvoir utiliser à nouveau le système.

For example the following can be used to set an account to expire in 180 days:

chage -E $(date -d +180days +%Y-%m-%d)

Passing the number -1 as the EXPIRE_DATE will remove an account expiration date.

-h, --help

Afficher un message d'aide et quitter.

-i, --iso8601

When printing dates, use YYYY-MM-DD format.

-I, --inactive INACTIVE

Set the number of days of inactivity after a password has expired before the account is locked. The INACTIVE option is the number of days of inactivity. A user whose account is locked must contact the system administrator before being able to use the system again.

Passing the number -1 as the INACTIVE will remove an account's inactivity.

-l, --list

Afficher les informations sur l'âge des comptes.

-m, --mindays MIN_DAYS

Set the minimum number of days between password changes to MIN_DAYS. A value of zero for this field indicates that the user may change their password at any time.

-M, --maxdays MAX_DAYS

Set the maximum number of days during which a password is valid. When MAX_DAYS plus LAST_DAY is less than the current day, the user will be required to change their password before being able to use their account. This occurrence can be planned for in advance by use of the -W option, which provides the user with advance warning.

Passing the number -1 as MAX_DAYS will remove checking a password's validity.

-R, --root CHROOT_DIR

Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory. Only absolute paths are supported.

-P, --prefix PREFIX_DIR

Apply changes to configuration files under the root filesystem found under the directory PREFIX_DIR. This option does not chroot and is intended for preparing a cross-compilation target. Some limitations: NIS and LDAP users/groups are not verified. PAM authentication is using the host files. No SELINUX support.

-W, --warndays WARN_DAYS

Set the number of days of warning before a password change is required. The WARN_DAYS option is the number of days prior to the password expiring that a user will be warned their password is about to expire.

If none of the options are selected, chage operates in an interactive fashion, prompting the user with the current values for all of the fields. Enter the new value to change the field, or leave the line blank to use the current value. The current value is displayed between a pair of [ ] marks.

NOTE

The chage program requires a shadow password file to be available.

The chage program will report only the information from the shadow password file. This implies that configuration from other sources (e.g. LDAP or empty password hash field from the passwd file) that affect the user's login will not be shown in the chage output.

The chage program will also not report any inconsistency between the shadow and passwd files (e.g. missing x in the passwd file). The pwck can be used to check for this kind of inconsistencies.

The chage command is restricted to the root user, except for the -l option, which may be used by an unprivileged user to determine when their password or account is due to expire.