RedHat uses PAM (Pluggable-Authentication-Module) for user authentication. There's an LDAP aware PAM module called pam_ldap at http://www.padl.com/software.html Mike Calvin Lam wrote: > > Can I use ldap server for user authentication instead of using shadow > password or password file in RedHat 6.0? If yes, how can I do so using > OpenLdap server? Thanks.