SHADOW(4-SysV)      RISC/os Reference Manual       SHADOW(4-SysV)



NAME
     shadow - shadow password file

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

     Here are the fields in /etc/shadow:

          username     The user's login name (ID).

          password     A 13-character encrypted password for the
                       user, a lock string to indicate that 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.

          minimum      The minimum number of days required
                       between password changes.

          maximum      The maximum number of days the password is
                       valid.

          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         Reserved for future use, set to zero.
                       Currently not used.

     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, passmgmt, or pwconv
     command.

FILES
     /etc/shadow





                         Printed 1/15/91                   Page 1

SHADOW(4-SysV)      RISC/os Reference Manual       SHADOW(4-SysV)



SEE ALSO
     passmgmt(1M), pwconv(1M), pwunconv(1M).
     getspent(3X), putspent(3X), passwd(4) in the Programmer's
     Reference Manual.
     login(1), passwd(1) in the User's Reference Manual.


















































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