Unix for Beginners
Unix Shell Programming
Advanced Unix
Unix Useful References
Unix Useful Resources
Selected Reading
© 2011 TutorialsPoint.COM
|
nscd - Unix, Linux Command
NAME
/usr/sbin/nscd - name service cache daemon
DESCRIPTION
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. See
nscd.conf(5).
Nscd provides cacheing for accesses of the
passwd(5),
group(5),
and
hosts(5)
databases through standard libc interfaces, such as
getpwnam(3),
getpwuid(3),
getgrnam(3),
getgrgid(3),
gethostbyname(3),
and others.
There are two caches for each database:
a positive one for items found, and a negative one
for items not found. Each cache has a separate TTL (time-to-live)
period for its data.
Note that the shadow file is specifically not cached.
getspnam(3)
calls remain uncached as a result.
As a result of this behavior there is not possible to change non-nscd user
to another non-nscd user via su service when nscd is running.
OPTIONS
Tag | Description |
--help |
will give you a list with all options and what they do.
|
NOTES
Nscd doesnt 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.
SEE ALSO
nscd was written by Thorsten Kukuk and Ulrich Drepper.
|
|
|