authconfig

TLDR

Display the current configuration (or dry run)

$ authconfig --test

Configure the server to use a different password hashing algorithm

$ authconfig --update --passalgo=[algorithm]

Enable LDAP authentication

$ authconfig --update --enableldapauth

Disable LDAP authentication

$ authconfig --update --disableldapauth

Enable Network Information Service (NIS)

$ authconfig --update --enablenis

Enable Kerberos

$ authconfig --update --enablekrb5

Enable Winbind (Active Directory) authentication

$ authconfig --update --enablewinbindauth

Enable local authorization

$ authconfig --update --enablelocauthorize