shadow(4)                      DG/UX R4.11MU05                     shadow(4)


NAME
       shadow - shadow password file

SYNOPSIS
       /etc/passwd

DESCRIPTION
       The shadow file is an access-restricted ASCII system file that
       contains an entry for each user on the system.  The fields within
       each entry are separated by colons; each entry is separated from the
       next by a new-line.  Unlike the /etc/passwd file, /etc/shadow does
       not have general read permission.

       Here are the fields in /etc/shadow:

       login_name  The name by which a user identifies himself or herself
                   when logging in.

       password    A 13-character encrypted password for the user, a lock
                   string to indicate the login is not accessible, or no
                   string to show that there is no password for the login.

       lastchanged The number of days between January 1, 1970, and the date
                   that the password was last modified.  This value must be
                   a multiple of 7 and less than 1048576.

       minimum     The minimum number of days required between password
                   changes.  This value must be a multiple of 7 in the range
                   0-63.

       maximum     The maximum number of days the password is valid.  This
                   value must be a multiple of 7 in the range 0-63.

       warn        The number of days before password expires that the user
                   is warned.

       inactive    The number of days of inactivity allowed for that user.

       expire      An absolute date specifying when the login may no longer
                   be used.

       flag        A character identifying a password generator.

       The encrypted password consists of 13 characters chosen from a
       64-character alphabet (., /, 0-9, A-Z, a-z).

       To update this file, use the passwd, useradd, usermod, or userdel
       command.

FILES
       /etc/shadow

SEE ALSO
       admshadow(1M), getspent(3C), login(1), passwd(1), passwd(4),
       putspent(3C), useradd(1M), userdel(1M), usermod(1M)

NOTES
       On a DG/UX system, the shadow password feature is disabled by
       default.  Use the administrative command, admshadow, to enable the
       shadow password feature.  The /etc/shadow file exists only when the
       shadow feature is enabled.  When the shadow feature is disabled, the
       /etc/passwd file contains password and aging information.

       The /etc/shadow fields warn, inactive, expire, and flag are currently
       ignored on a DG/UX system.  If any of the used age fields
       (lastchanged, minimum and maximum) contain invalid values the DG/UX
       commands behave as if the user has no password aging.


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