Quando eu tento instalar o nss-pam-ldapd no CentOS 6.8 eu recebo o seguinte:
$ sudo yum install nss-pam-ldapd
Loaded plugins: fastestmirror, security
Setting up Install Process
No package nss-pam-ldapd available.
Error: Nothing to do
Por favor, informe
$ yum repolist
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
repolist: 0