man8/nscd.8

   1 .\" -*- nroff -*-
   2 .\" Copyright 1999 SuSE GmbH Nuernberg, Germany
   3 .\" Author: Thorsten Kukuk <kukuk@suse.de>
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  20 .TH NSCD 8 1999-10-01 "GNU" "Linux Programmer's Manual"
  21 .SH NAME
  22 /usr/sbin/nscd \- name service cache daemon
  23 .SH DESCRIPTION
  24 Nscd is a daemon that provides a cache for the most common name service
  25 requests.
  26 The default configuration file,
  27 .IR /etc/nscd.conf ,
  28 determines the behavior of the cache daemon.
  29 See
  30 .BR nscd.conf (5).
  31
  32 Nscd provides caching for accesses of the
  33 .BR passwd (5),
  34 .BR group (5),
  35 and
  36 .BR hosts (5)
  37 databases through standard libc interfaces, such as
  38 .BR getpwnam (3),
  39 .BR getpwuid (3),
  40 .BR getgrnam (3),
  41 .BR getgrgid (3),
  42 .BR gethostbyname (3),
  43 and others.
  44
  45 There are two caches for each database:
  46 a positive one for items found, and a negative one
  47 for items not found.
  48 Each cache has a separate TTL (time-to-live)
  49 period for its data.
  50 Note that the shadow file is specifically not cached.
  51 .BR getspnam (3)
  52 calls remain uncached as a result.
  53 .SH OPTIONS
  54 .TP
  55 .B "\-\-help"
  56 will give you a list with all options and what they do.
  57 .SH NOTES
  58 Nscd doesn't know anything about the underlying protocols for a
  59 service.
  60 This also means, that if you change
  61 .I /etc/resolv.conf
  62 for DNS queries, nscd will continue to use the old one if you have
  63 configured
  64 .I /etc/nsswitch.conf
  65 to use DNS for host lookups.
  66 In such a case, you need to restart
  67 nscd.
  68 .SH "SEE ALSO"
  69 .BR nscd.conf (5),
  70 .BR nsswitch.conf (5)
  71 .\" .SH AUTHOR
  72 .\" .B nscd
  73 .\" was written by Thorsten Kukuk and Ulrich Drepper.