1 .\" Copyright 1999 SuSE GmbH Nuernberg, Germany
2 .\" Author: Thorsten Kukuk <kukuk@suse.de>
4 .\" %%%LICENSE_START(GPLv2+_SW_3_PARA)
5 .\" This program is free software; you can redistribute it and/or
6 .\" modify it under the terms of the GNU General Public License as
7 .\" published by the Free Software Foundation; either version 2 of the
8 .\" License, or (at your option) any later version.
10 .\" This program is distributed in the hope that it will be useful,
11 .\" but WITHOUT ANY WARRANTY; without even the implied warranty of
12 .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 .\" General Public License for more details.
15 .\" You should have received a copy of the GNU General Public
16 .\" License along with this manual; if not, see
17 .\" <http://www.gnu.org/licenses/>.
20 .\" 2008-12-05 Petr Baudis <pasky@suse.cz>
21 .\" Rewrite the NOTES section to reflect modern reality
23 .TH NSCD 8 2012-05-10 "GNU" "Linux Programmer's Manual"
25 nscd \- name service cache daemon
27 Nscd is a daemon that provides a cache for the most common name service
29 The default configuration file,
31 determines the behavior of the cache daemon.
35 Nscd provides caching for accesses of the
40 databases through standard libc interfaces, such as
45 .BR gethostbyname (3),
48 There are two caches for each database:
49 a positive one for items found, and a negative one
51 Each cache has a separate TTL (time-to-live)
53 Note that the shadow file is specifically not cached.
55 calls remain uncached as a result.
59 will give you a list with all options and what they do.
61 The daemon will try to watch for changes in configuration files
62 appropriate for each database (e.g.,
72 database), and flush the cache when these are changed.
73 However, this will happen only after a short delay (unless the
75 mechanism is available and glibc 2.9 or later is available),
76 and this auto-detection does not cover configuration files
77 required by nonstandard NSS modules, if any are specified in
78 .IR /etc/nsswitch.conf .
79 In that case, you need to run the following command
80 after changing the configuration file of the database so that
82 invalidates its cache:
84 $ \fBnscd -i\fP \fI<database>\fP
90 .\" was written by Thorsten Kukuk and Ulrich Drepper.