authunix_create_default - Linux


authunix_create_default creates a default authorization method for UNIX authentication. This method is used to authenticate users against local system accounts. It is typically used on systems where other authentication methods, such as LDAP or Kerberos, are not available or desired.


authunix_create_default -k KEYTAB -P PASSWORD


  • -k KEYTAB: The location of the keytab file. This file contains the encrypted keys for the principals that will be used for authentication.
  • -P PASSWORD: The password for the default principal. This principal will be used to authenticate users who do not have a valid entry in the keytab file.


To create a default authorization method for UNIX authentication using a keytab file:

authunix_create_default -k /etc/krb5.keytab

To create a default authorization method for UNIX authentication using a password:

authunix_create_default -P secret

Common Issues

  • If the keytab file does not exist or is not in the correct format, the command will fail.
  • If the password is incorrect, the command will fail.


The authunix_create_default command can be used with other Linux commands to manage authentication. For example, it can be used with the kadmin command to create and manage principals.

Related Commands

  • kadmin: A command-line tool for managing Kerberos principals.
  • kinit: A command-line tool for obtaining Kerberos tickets.
  • ldapadd: A command-line tool for adding entries to an LDAP directory.