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pam_unix2

pam_unix2(8)							 Reference Manual						      pam_unix2(8)

NAME

       pam_unix2 - Standard PAM module for traditional password authentication

DESCRIPTION

       The  pam_unix2  PAM  module is for traditional password authentication. It uses standard calls from the glibc NSS libraries to retrieve and
       set account information as well as authentication. Usually this is obtained from the the local files /etc/passwd and /etc/shadow or  from a
       NIS map.

       The  options  can be added in the PAM configuration files for every single service.  /etc/default/passwd defines, which password encryption
       algorithm should be used in case of a password change.

OPTIONS

       The following options may be passed to all types of management groups except session:

       debug  A lot of debug informations are printed with syslog(3).

       nullok Normally the account is disabled if no password is set or if the length of the password is  zero.  With  this  option  the  user	is
	      allowed to change the password for such accounts. This option does not overwrite a hardcoded default by the calling process.

       use_first_pass
	      The  default is, that pam_unix2 tries to get the authentication token from a previous module.  If no token is available, the user is
	      asked for the old password.  With this option, pam_unix2 aborts with an error if no authentication token from a previous	module	is
	      available.

       The following additional options may be passed to the passwd rules of this modules:

       nisdir=<path>
	      This options specifies a path to the source files for NIS maps on a NIS master server. If this option is given, the passwords of NIS
	      accounts will not be changed with yppasswd(1), instead the local passwd and shadow files below <path> will be modified. In  conjunc-
	      tion with rpasswdd(8) and pam_make rpc.yppasswdd(8) can be replaced with a more secure solution on the NIS master server.

       use_authtok
	      Set  the	new password to the one provided by the previously stacked password module. If this option is not set, pam_unix2 would ask
	      the user for the new password.

       One of the following options may be passed to the session rules of this modules:

       debug  Some messages (login time, logout time) are logged to syslog with priority LOG_DEBUG.

       trace  Some messages (login time, logout time) are logged to syslog with priority LOG_NOTICE.

       none   No messages are logged. This is the default.

       The acct management does not recognize any additional options. For root, password and login expire are ignored, only on	aging  warning	is
       printed. If no shadow information exists, it always returns success.

FILES

       /etc/default/passwd

SEE ALSO

       login(1), passwd(1), pam.conf(8), pam.d(8), pam_pwcheck(8), pam(8), rpasswd(1), rpasswdd(8), rpc.yppasswdd(8), yppasswd(1)

pam_unix2							    August 2006 						      pam_unix2(8)