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nscd(8) [centos man page]

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

NAME
nscd - name service cache daemon DESCRIPTION
Nscd is a daemon that provides a cache for the most common name service requests. The default configuration file, /etc/nscd.conf, deter- mines 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 getpw- nam(3), getpwuid(3), getgrnam(3), getgrgid(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. OPTIONS
--help will give you a list with all options and what they do. NOTES
The daemon will try to watch for changes in configuration files appropriate for each database (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> SEE ALSO
nscd.conf(5), nsswitch.conf(5) COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. GNU
2012-05-10 NSCD(8)

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nscd(1M)						  System Administration Commands						  nscd(1M)

NAME
nscd - name service cache daemon SYNOPSIS
/usr/sbin/nscd [-f configuration-file] [-g] [-e cachename, yes | no] [-i cachename] DESCRIPTION
nscd is a process 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(4). nscd provides caching for the passwd(4), group(4), hosts(4), ipnodes(4), exec_attr(4), prof_attr(4), and user_attr(4) databases through standard libc interfaces, such as gethostbyname(3NSL), getipnodebyname(3SOCKET), gethostbyaddr(3NSL), and others. Each cache has a separate time-to-live for its data; modifying the local database (/etc/hosts, /etc/resolv.conf, and so forth) causes that cache to become invali- dated upon the next call to nscd. The shadow file is specifically not cached. getspnam(3C) calls remain uncached as a result. nscd also acts as its own administration tool. If an instance of nscd is already running, commands are passed to the running version trans- parently. In order to preserve NIS+ security, the nscd service checks the permissions on the passwd table if NIS+ is being used. If this table cannot be read by unauthenticated users, then nscd will make sure that any encrypted password information returned from the NIS+ server is sup- plied only to the owner of that password. OPTIONS
Several of the options described below require a cachename specification. Supported values are passwd, group, hosts, ipnodes, exec_attr, prof_attr, and user_attr. -f configuration-file Causes nscd to read its configuration data from the specified file. -g Prints current configuration and statistics to standard output. This is the only option executable by non-root users. -e cachename, yes|no Enables or disables the specified cache. -i cachename Invalidate the specified cache. EXAMPLES
Example 1: Stopping and restarting the nscd daemon. example# svcadm disable system/name-service-cache example# svcadm enable system/name-service-cache FILES
/etc/nscd.conf Determines athe behavior of the cache daemon ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
svcs(1), svcadm(1M), getspnam(3C), gethostbyname(3NSL), getipnodebyname(3SOCKET), exec_attr(4), group(4), hosts(4), ipnodes(4), nscd.conf(4), nsswitch.conf(4), passwd(4), prof_attr(4), user_attr(4), attributes(5), NOTES
The output from the -g option to nscd is subject to change. Do not rely upon it as a programming interface. The nscd service is managed by the service management facility, smf(5), under the service identifier: svc:/system/name-service-cache Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser- vice's status can be queried using the svcs(1) command. SunOS 5.10 30 Oct 2003 nscd(1M)

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