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Linux 2.6 - man page for nscd (linux section 8)

NSCD(8) 			    Linux Programmer's Manual				  NSCD(8)

       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.
       See nscd.conf(5).

       Nscd  provides  caching	for  accesses  of the passwd(5), group(5), and hosts(5) databases
       through standard libc interfaces, such  as  getpwnam(3),  getpwuid(3),  getgrnam(3),  get-
       grgid(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.

       --help will give you a list with all options and what they do.

       The daemon will try to watch for changes in configuration files appropriate for each data-
       base (e.g., /etc/passwd for the passwd database or /etc/hosts and /etc/resolv.conf for the
       hosts database), and flush the cache when these are changed.  However,  this  will  happen
       only  after  a  short delay (unless the inotify(7) mechanism is available and glibc 2.9 or
       later is available), and this auto-detection does not cover configuration  files  required
       by nonstandard NSS modules, if any are specified in /etc/nsswitch.conf.	In that case, you
       need to run the following command after changing the configuration file of the database so
       that nscd invalidates its cache:

	   $ nscd -i <database>

       nscd.conf(5), nsswitch.conf(5)

       This  page  is  part of release 3.55 of the Linux man-pages project.  A description of the
       project,    and	  information	 about	  reporting    bugs,	can    be    found     at

GNU					    2012-05-10					  NSCD(8)

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