Disclaimer:

These are my notes following my self-study on troubleshooting . No material comes from either Red Hat course or the Red Hat exam. You will not find any NDA information here. All contents are my own thoughts/understanding on the subject matter.

  • Identify and fix authentication issues

  • Identify and fix pluggable authentication module (PAM) issues

  • Identify and fix LDAP and Kerberos identity management issues

When you troubleshoot check the LDAP options using the command  and verify the following options are set:

LDAP

Use LDAP AUTHENTICATION

Use KERBEROS

the command used

authconfig-tui
authconfig-tui

  1. Ensure the following options are set

Check hosts file and connection

Check the following files when you troubleshoot

/etc/openldap/openldap.conf
/etc/krb5.conf
/etc/krbt.keytab