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/usr/sbin/nscd - name service cache daemon
Nscd is a daemon that provides a cache for the most common name service requests. The
default configuration file, /etc/nscd.conf, determines the behavior of the cache daemon.
Nscd provides cacheing for the passwd(5), group(5), and hosts(5) databases through stan-
dard libc interfaces, such as getpwnam(3), getpwuid(3), getgrnam(3), getgrgid(3), gethost-
byname(3), and others. Each cache has a separate TTL (time-to-live) for its data; modify-
ing the local database (/etc/passwd, and so forth) causes the cache to become invalidated
within fifteen seconds. Note that the shadow file is specifically not cached. getspnam(3)
calls remain uncached as a result.
--help will give you a list with all options and what they do.
Nscd doesn't know anything about the underlaying protocols for a service. This also means,
that if you change /etc/resolv.conf for DNS queries, nscd will continue to use the old one
if you have configured /etc/nsswitch.conf to use DNS for host lookups. In such a case, you
need to restart nscd.
nscd was written by Thorsten Kukuk and Ulrich Drepper.
GNU C Library 1999-10 nscd(8)
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