1NSCD(8)                    Linux Programmer's Manual                   NSCD(8)
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NAME

6       nscd - name service cache daemon
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DESCRIPTION

9       nscd is a daemon that provides a cache for the most common name service
10       requests.  The default configuration file,  /etc/nscd.conf,  determines
11       the behavior of the cache daemon.  See nscd.conf(5).
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13       nscd provides caching for accesses of the passwd(5), group(5), hosts(5)
14       services(5) and netgroup databases through  standard  libc  interfaces,
15       such  as getpwnam(3), getpwuid(3), getgrnam(3), getgrgid(3), gethostby‐
16       name(3), and others.
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18       There are two caches for each database: a positive one for items found,
19       and  a negative one for items not found.  Each cache has a separate TTL
20       (time-to-live) period for its data.   Note  that  the  shadow  file  is
21       specifically  not  cached.   getspnam(3) calls remain uncached as a re‐
22       sult.
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OPTIONS

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

28       The daemon will try to watch for changes in configuration files  appro‐
29       priate  for each database (e.g., /etc/passwd for the passwd database or
30       /etc/hosts and /etc/resolv.conf for the hosts database), and flush  the
31       cache  when  these are changed.  However, this will happen only after a
32       short delay (unless the inotify(7) mechanism is available and glibc 2.9
33       or later is available), and this auto-detection does not cover configu‐
34       ration files required by nonstandard NSS modules, if any are  specified
35       in  /etc/nsswitch.conf.   In  that  case, you need to run the following
36       command after changing the configuration file of the database  so  that
37       nscd invalidates its cache:
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39           $ nscd -i <database>
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SEE ALSO

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

45       This  page  is  part of release 5.12 of the Linux man-pages project.  A
46       description of the project, information about reporting bugs,  and  the
47       latest     version     of     this    page,    can    be    found    at
48       https://www.kernel.org/doc/man-pages/.
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52GNU                               2015-05-07                           NSCD(8)
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