2004-11-03 13:51:07 +00:00
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.\" -*- nroff -*-
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.\" Copyright 1999 SuSE GmbH Nuernberg, Germany
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.\" Author: Thorsten Kukuk <kukuk@suse.de>
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.\"
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.\" This program is free software; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public License as
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.\" published by the Free Software Foundation; either version 2 of the
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.\" License, or (at your option) any later version.
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.\"
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.\" This program is distributed in the hope that it will be useful,
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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.\" General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU General Public
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.\" License along with this program; see the file COPYING. If not,
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.\" write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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.\" Boston, MA 02111-1307, USA.
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.\"
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.TH NSCD 8 1999-10 "GNU C Library" "Linux Programmer's Manual"
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.SH NAME
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2005-07-06 07:41:37 +00:00
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/usr/sbin/nscd \- name service cache daemon
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2004-11-03 13:51:07 +00:00
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.SH DESCRIPTION
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Nscd is a daemon that provides a cache for the most common name service
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requests. The default configuration file,
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.IR /etc/nscd.conf ,
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determines the behavior of the cache daemon. See
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.BR nscd.conf (5).
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Nscd provides cacheing for accesses of the
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.BR passwd (5),
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.BR group (5),
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and
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.BR hosts(5)
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databases through standard libc interfaces, such as
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.BR getpwnam (3),
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.BR getpwuid (3),
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.BR getgrnam (3),
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.BR getgrgid (3),
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.BR gethostbyname (3),
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and others.
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There are two caches for each database:
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a positive one for items found, and a negative one
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for items not found. Each cache has a separate TTL (time-to-live)
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period for its data.
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Note that the shadow file is specifically not cached.
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.BR getspnam (3)
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calls remain uncached as a result.
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.SH OPTIONS
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.TP
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.B "\-\-help"
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will give you a list with all options and what they do.
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.SH NOTES
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Nscd doesn't know anything about the underlaying protocols for a
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service. This also means, that if you change
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.I /etc/resolv.conf
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for DNS queries, nscd will continue to use the old one if you have
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configured
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.I /etc/nsswitch.conf
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to use DNS for host lookups. In such a case, you need to restart
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nscd.
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.SH "SEE ALSO"
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.BR nscd.conf (5),
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.BR nsswitch.conf (5)
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.SH AUTHOR
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.B nscd
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was written by Thorsten Kukuk and Ulrich Drepper.
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