Le Name Service Switch (NSS) autorise le remplacement des traditionnels fichiers Unix de configuration (par exemple /etc/passwd, /etc/group, /etc/hosts) par une ou plusieurs bases de données centralisées, les mécanismes utilisés pour accéder à ces bases étant configurables
A system administrator usually configures the operating system's name services using the file /etc/nsswitch.conf. This lists databases (such as passwd, shadow and group) and one or more sources for obtaining that information. Examples for sources are files for local files, ldap for the Lightweight Directory Access Protocol, nis for the Network Information Service, nisplus for NIS+, wins for Windows Internet Name Service).
exp:
A system administrator usually configures the operating system's name services using the file /etc/nsswitch.conf. This lists databases (such as passwd, shadow and group) and one or more sources for obtaining that information. Examples for sources are files for local files, ldap for the Lightweight Directory Access Protocol, nis for the Network Information Service, nisplus for NIS+, wins for Windows Internet Name Service).
exp:
passwd: files ldap shadow: files group: files ldap hosts: dns nis files
plus d info
http://linux.about.com/od/lna_guide/a/gdelna52t01.htm
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