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GROUP.CONF(5)                            Linux-PAM Manual                           GROUP.CONF(5)

       group.conf - configuration file for the pam_group module

       The pam_group PAM module does not authenticate the user, but instead it grants group
       memberships (in the credential setting phase of the authentication module) to the user.
       Such memberships are based on the service they are applying for.

       For this module to function correctly there must be a correctly formatted
       /etc/security/group.conf file present. White spaces are ignored and lines maybe extended
       with '\' (escaped newlines). Text following a '#' is ignored to the end of the line.

       The syntax of the lines is as follows:


       The first field, the services field, is a logic list of PAM service names that the rule
       applies to.

       The second field, the tty field, is a logic list of terminal names that this rule applies

       The third field, the users field, is a logic list of users, or a UNIX group, or a netgroup
       of users to whom this rule applies. Group names are preceded by a '%' symbol, while
       netgroup names are preceded by a '@' symbol.

       For these items the simple wildcard '*' may be used only once. With UNIX groups or
       netgroups no wildcards or logic operators are allowed.

       The times field is used to indicate "when" these groups are to be given to the user. The
       format here is a logic list of day/time-range entries. The days are specified by a
       sequence of two character entries, MoTuSa for example is Monday Tuesday and Saturday. Note
       that repeated days are unset MoMo = no day, and MoWk = all weekdays bar Monday. The two
       character combinations accepted are Mo Tu We Th Fr Sa Su Wk Wd Al, the last two being
       week-end days and all 7 days of the week respectively. As a final example, AlFr means all
       days except Friday.

       Each day/time-range can be prefixed with a '!' to indicate "anything but". The time-range
       part is two 24-hour times HHMM, separated by a hyphen, indicating the start and finish
       time (if the finish time is smaller than the start time it is deemed to apply on the
       following day).

       The groups field is a comma or space separated list of groups that the user inherits
       membership of. These groups are added if the previous fields are satisfied by the user's

       For a rule to be active, ALL of service+ttys+users must be satisfied by the applying

       These are some example lines which might be specified in /etc/security/group.conf.

       Running 'xsh' on tty* (any ttyXXX device), the user 'us' is given access to the floppy
       (through membership of the floppy group)


       Running 'xsh' on tty* (any ttyXXX device), the user 'sword' is given access to games
       (through membership of the floppy group) after work hours.

           xsh; tty* ;sword;!Wk0900-1800;games, sound
           xsh; tty* ;*;Al0900-1800;floppy

       Any member of the group 'admin' running 'xsh' on tty*, is granted access (at any time) to
       the group 'plugdev'

           xsh; tty* ;%admin;Al0000-2400;plugdev

       pam_group(8), pam.d(5), pam(7)

       pam_group was written by Andrew G. Morgan <morgan AT kernel.org>.

Linux-PAM Manual                            09/19/2013                              GROUP.CONF(5)

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