Newsletters Archive - 2012

If you would like to know more about the Newsletter, please email me.

  Configure System Authentication Using OpenLDAP on CentOS 5 — (15-August-2012)

When a user logs in to a Linux system, the username and password combination 
must be verified, or authenticated, as a valid and active user. A lot of times 
the information needed to authenticate the user is located on the local system 
through entries in the /etc/passwd and /etc/shadow files. Another option is to 
allow the system to defer user authentication to a user database on a remote 
system like, for example, an LDAP directory. This is a popular option as it 
allows administrators to centralize username and password information.

In the following guide, I will present the steps required to configure 
authentication for a Linux client through LDAP using Pluggable Authentication 
Modules (PAM) and Name Service Switch (NSS). The Linux client will be 
configured to access user information stored in an LDAP directory database such 
as username, UID number, GID number, home directory, login shell, and other 
user information that can be used to authenticate to the client system.

Jeffrey M. Hunter, OCP
Sr. Database Administrator