AUTHCONFIG(8)               System Manager's Manual              AUTHCONFIG(8)

       authconfig, authconfig-tui - an interface for configuring system
       authentication resources

              [options] {--update|--updateall|--test|--probe|--restorebackup
              <name>|--savebackup <name>|--restorelastbackup}

       authconfig provides a simple method of configuring
       /etc/sysconfig/network to handle NIS, as well as /etc/passwd and
       /etc/shadow, the files used for shadow password support.  Basic LDAP,
       Kerberos 5, and Winbind client configuration is also provided.

       If --test action is specified, the authconfig just reads the current
       settings from the various configuration files and prints their values.
       If --update action is specified, authconfig must be run by root and
       configuration changes are saved. Only the files affected by the
       configuration changes are overwritten.  If --updateall action is
       specified, authconfig must be run by root and all configuration files
       are written.  The --probe action instructs authconfig to use DNS and
       other means to guess at configuration information for the current host,
       print its guesses if it finds them, to standard output, and exit.

       The --restorebackup, --savebackup, and --restorelastbackup actions
       provide a possibility to save and later restore a backup of
       configuration files which authconfig modifies. Authconfig also saves an
       automatic backup of configuration files before every configuration
       change. This special backup can be restored by the --restorelastbackup

       If --nostart is specified (which is what the install program does),
       ypbind or other daemons will not be started or stopped immediately
       following program execution, but only enabled to start or stop at boot

       The --enablenis, --enableldap, --enablewinbind, and --enablehesiod
       options are used to configure user information services in
       /etc/nsswitch.conf, the --enablecache option is used to configure
       naming services caching, and the --enableshadow, --enableldapauth,
       --enablekrb5, and --enablewinbindauth options are used to configure
       authentication functions via /etc/pam.d/system-auth.  Each --enable has
       a matching --disable option that disables the service if it is already
       enabled. The respective services have parameters which configure their
       server names etc.

       The algorithm used for storing new password hashes can be specified by
       the --passalgo option which takes one of the following possible values
       as a parameter: descrypt, bigcrypt, md5, sha256, and sha512.

       The --enablelocauthorize option allows to bypass checking network
       authentication services for authorization and the --enablesysnetauth
       allows authentication of system accounts (with uid < 500) by these

       When the configuration settings allow use of SSSD for user information
       services and authentication, SSSD will be automatically used instead of
       the legacy services and the SSSD configuration will be set up so there
       is a default domain populated with the settings required to connect the
       services. The --enablesssd and --enablesssdauth options force adding
       SSSD to /etc/nsswitch.conf and /etc/pam.d/system-auth, but they do not
       set up the domain in the SSSD configuration files. The SSSD
       configuration has to be set up manually. The allowed configuration of
       services for SSSD are: LDAP for user information (--enableldap) and
       either LDAP (--enableldapauth), or Kerberos (--enablekrb5) for
       authentication. Please note that even though these options alone do not
       trigger any change in SSSD configuration files this may not be true if
       any of these options is used in conjunction with other options such as
       --enableldap or --updateall.

       In case SSSD does not support some feature of the legacy services that
       are required for the site configuration, the use of the legacy services
       can be forced by setting FORCELEGACY=yes in /etc/sysconfig/authconfig.

       The list of options mentioned here in the manual page is not
       exhaustive, please refer to authconfig --help for the complete list of
       the options.

       For namelist you may substitute either a single name or a comma-
       separated list of names.

       The SSSD service is enabled and possibly started by authconfig when at
       least two of the following three conditions are met:
       1) /etc/sssd/sssd.conf file exists (or is configured via the implicit
       SSSD support)
       2) SSSD authentication is enabled ( is used in PAM
       3) SSSD is enabled for user identity (nsswitch.conf contains sss)

       When --update action is used the enablement or disablement and possible
       restart of services happens only in case the changed configuration
       options affect the service to be restarted. This means that if for
       example the ypbind service is enabled with authconfig --update
       --nostart --enablenis but not started and you run the same command
       without the --nostart later the ypbind service will not be started
       because no configuration change affecting ypbind happened.

       authconfig returns 0 on success, 1 on backup operation errors, 2 if not
       running with sufficient privileges, 3 if unknown password hash
       algorithm is specified or incorrect values are set for password
       strength checking (this error is non fatal), 4 if download of CA
       certificate fails, 5 if writing configuration files fails on
       --updateall action, 6 if writing fails on --update action, 7 if Winbind
       domain join fails.

              Used to track whether or not particular authentication
              mechanisms are enabled.  Currently includes variables named
              USEWINBINDAUTH, USENIS, USELDAP, and others.
              Used for shadow password support.
              Configuration file for NIS support.
              Another configuration file for NIS support.
              Used to configure nss_ldap, pam_ldap, nslcd, and the OpenLDAP
              library. Only the files already existing on the system are
              Used to configure Kerberos 5.
              Used to configure winbind authentication.
              Used to configure user information services.
              Used to configure parameters of user accounts (minimum UID of a
              regular user, password hashing algorithm).
              Common PAM configuration for system services which include it
              using the include directive. It is created as symlink and not
              relinked if it points to another file.
              Contains the actual PAM configuration for system services and is
              the default target of the /etc/pam.d/system-auth symlink. If a
              local configuration of PAM is created (and symlinked from
              system-auth file) this file can be included there.

       authconfig-gtk(8), system-auth-ac(5), passwd(5), shadow(5), pwconv(1),
       domainname(1), ypbind(8), nsswitch.conf(5), smb.conf(5), sssd(8)

       Nalin Dahyabhai <>, Preston Brown <>,
       Matt Wilson <>, Tomas Mraz <>

Red Hat, Inc.                    22 July 2011                    AUTHCONFIG(8)