chage man page on aLinux

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CHAGE(1)			 User Commands			      CHAGE(1)

NAME
       chage - change user password expiry information

SYNOPSIS
       chage [options] user

DESCRIPTION
       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 his/her 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).

       -E, --expiredate EXPIRE_DATE
	      Set the date or number of days since January 1, 1970 on which
	      the user's account will no longer be accessible. The date may
	      also be expressed in the format YYYY-MM-DD (or the format more
	      commonly used in your area). 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 EXPIRE_DATE will remove an account
	      expiration date.

       -h, --help
	      Display help message and exit.

       -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
	      Show account aging information.

       -m, --mindays MIN_DAYS
	      Set the minimum number of days between password changes. A value
	      of zero for this field indicates that the user may change
	      his/her 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 his/her password before being
	      able to use his/her 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.

       -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 his/her
	      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. Its
       functionality is not available when passwords are stored in the passwd
       file.

       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
       his/her password or account is due to expire.

FILES
       /etc/passwd
	      user account information

       /etc/shadow
	      secure user account information

EXIT VALUES
       The chage command exits with the following values:

       0      success

       1      permission denied

       2      invalid command syntax

       15     can't find the shadow password file

SEE ALSO
       passwd(5), shadow(5).

User Commands			  01/22/2006			      CHAGE(1)
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