nss(5) File Formats Manual nss(5) nss - , , (Name Service Switch) GNU C. , . GNU C . , . , , . , . , , . /etc/default/nss . NSS. . , '#', . : NETID_AUTHORITATIVE = TRUE|FALSE TRUE, NIS initgroups(3) NIS netid.byname (authoritative). , group.byname . netid.byname . . SERVICES_AUTHORITATIVE = TRUE|FALSE TRUE, NIS getservbyname(3) getservbyname_r(3) , NIS services.byservicename ; /proto /proto (primary) . . SETENT_BATCH_READ = TRUE|FALSE TRUE, NIS setpwent(3) setgrent(3) , , , getpwent(3) getgrent(3). getpwent(3) getgrent(3) . /etc/default/nss : NETID_AUTHORITATIVE=FALSE SERVICES_AUTHORITATIVE=FALSE SETENT_BATCH_READ=FALSE nsswitch.conf(5) () Alex Nik , Azamat Hackimov , Dmitry Bolkhovskikh , Yuri Kozlov , Kirill Rekhov ; GNU (GNU General Public License - GPL, 3 ) , - . - , , () () () <>. Linux 6.15 17 2025 . nss(5)