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   1  #
   2  # /etc/pam.d/common-auth - authentication settings common to all services
   3  #
   4  # This file is included from other service-specific PAM config files,
   5  # and should contain a list of the authentication modules that define
   6  # the central authentication scheme for use on the system
   7  # (e.g., /etc/shadow, LDAP, Kerberos, etc.).  The default is to use the
   8  # traditional Unix authentication mechanisms.
   9  #
  10  # As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
  11  # To take advantage of this, it is recommended that you configure any
  12  # local modules either before or after the default block, and use
  13  # pam-auth-update to manage selection of other modules.  See
  14  # pam-auth-update(8) for details.
  15  
  16  # here are the per-package modules (the "Primary" block)
  17  auth    [success=1 default=ignore]    pam_unix.so nullok_secure
  18  # here's the fallback if no module succeeds
  19  auth    requisite            pam_deny.so
  20  # prime the stack with a positive return value if there isn't one already;
  21  # this avoids us returning an error just because nothing sets a success code
  22  # since the modules above will each just jump around
  23  auth    required            pam_permit.so
  24  # and here are more per-package modules (the "Additional" block)
  25  auth    optional            pam_cap.so 
  26  # end of pam-auth-update config