Provided by: login_4.0.18.2-1ubuntu2_i386 bug

NAMN

       login.defs - shadow password suite configuration

BESKRIVNING

       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.

       This file is a readable text file, each line of the file describing one
       configuration parameter. The lines consist of a configuration name and
       value, separated by whitespace. Blank lines and comment lines are
       ignored. Comments are introduced with a "#" pound sign and the pound
       sign must be the first non-white character of the line.

       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.

       Följande konfigurationsposter tillhandahålls:

       CHFN_AUTH (boolesk)
           If yes, the chfn and chsh programs will require authentication
           before making any changes, unless run by the superuser.

       CHFN_RESTRICT (sträng)
           This parameter specifies which values in the gecos field of the
           /etc/passwd file may be changed by regular users using the chfn
           program. It can be any combination of letters f ,r, w, h, for Full
           name, Room number, Work phone, and Home phone, respectively. For
           backward compatibility, "yes" is equivalent to "rwh" and "no" is
           equivalent to "frwh". If not specified, only the superuser can make
           any changes. The most restrictive setting is better achieved by not
           installing chfn SUID.

       GID_MAX (nummer), GID_MIN (nummer)
           Range of group IDs to choose from for the useradd and groupadd
           programs.

       MAIL_DIR (sträng)
           The mail spool directory. This is needed to manipulate the mailbox
           when its corresponding user account is modified or deleted. If not
           specified, a compile-time default is used.

       PASS_MAX_DAYS (nummer)
           The maximum number of days a password may be used. If the password
           is older than this, a password change will be forced. If not
           specified, -1 will be assumed (which disables the restriction).

       PASS_MIN_DAYS (nummer)
           The minimum number of days allowed between password changes. Any
           password changes attempted sooner than this will be rejected. If
           not specified, -1 will be assumed (which disables the restriction).

       PASS_WARN_AGE (nummer)
           The number of days warning given before a password expires. A zero
           means warning is given only upon the day of expiration, a negative
           value means no warning is given. If not specified, no warning will
           be provided.

       PASS_MAX_DAYS, PASS_MIN_DAYS och PASS_WARN_AGE används endast när
       kontot skapas. Alla ändringar av dessa inställningar påverkar inte
       existerande konton.

       UID_MAX (nummer), UID_MIN (nummer)
           Range of user IDs to choose from for the useradd program.

       UMASK (nummer)
           The permission mask is initialized to this value. If not specified,
           the permission mask will be initialized to 022.

       USERDEL_CMD (sträng)
           If defined, this command is run when removing a user. It should
           remove any at/cron/print jobs etc. owned by the user to be removed
           (passed as the first argument).

CROSS REFERENCE

       The following cross reference shows which programs in the shadow
       password suite use which parameters.

       chfn
           CHFN_AUTH CHFN_RESTRICT

       chsh
           CHFN_AUTH

       groupadd
           GID_MAX GID_MIN

       newusers
           PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE UMASK

       pwconv
           PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE

       useradd
           GID_MAX GID_MIN PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE UID_MAX
           UID_MIN UMASK

       userdel
           MAIL_DIR USERDEL_CMD

       usermod
           MAIL_DIR

FEL

       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 programs such as: login(1), passwd(1), su(1). Please
       refer to the corresponding PAM configuration files instead.

SE OCKSÅ

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