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Man Pages

Manual Reference Pages  -  SSSD (8)

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sssd - System Security Services Daemon



sssd [options]


SSSD provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides an NSS and PAM interface toward the system and a pluggable backend system to connect to multiple different account sources as well as D-Bus interface. It is also the basis to provide client auditing and policy services for projects like FreeIPA. It provides a more robust database to store local users as well as extended user data.


-d,--debug-level LEVEL

SSSD supports two representations for specifying the debug level. The simplest is to specify a decimal value from 0-9, which represents enabling that level and all lower-level debug messages. The more comprehensive option is to specify a hexadecimal bitmask to enable or disable specific levels (such as if you wish to suppress a level).

Currently supported debug levels:

0, 0x0010: Fatal failures. Anything that would prevent SSSD from starting up or causes it to cease running.

1, 0x0020: Critical failures. An error that doesnt kill the SSSD, but one that indicates that at least one major feature is not going to work properly.

2, 0x0040: Serious failures. An error announcing that a particular request or operation has failed.

3, 0x0080: Minor failures. These are the errors that would percolate down to cause the operation failure of 2.

4, 0x0100: Configuration settings.

5, 0x0200: Function data.

6, 0x0400: Trace messages for operation functions.

7, 0x1000: Trace messages for internal control functions.

8, 0x2000: Contents of function-internal variables that may be interesting.

9, 0x4000: Extremely low-level tracing information.

To log required bitmask debug levels, simply add their numbers together as shown in following examples:

Example: To log fatal failures, critical failures, serious failures and function data use 0x0270.

Example: To log fatal failures, configuration settings, function data, trace messages for internal control functions use 0x1310.

Note: The bitmask format of debug levels was introduced in 1.7.0.

Default: 0


1: Add a timestamp to the debug messages

0: Disable timestamp in the debug messages

Default: 1


1: Add microseconds to the timestamp in debug messages

0: Disable microseconds in timestamp

Default: 0


Send the debug output to files instead of stderr. By default, the log files are stored in /var/log/sssd and there are separate log files for every SSSD service and domain.


Become a daemon after starting up.


Run in the foreground, dont become a daemon.


Specify a non-default config file. The default is /usr/local/etc/sssd/sssd.conf. For reference on the config file syntax and options, consult the sssd.conf(5) manual page.


Display help message and exit.


Print version number and exit.



Informs the SSSD to gracefully terminate all of its child processes and then shut down the monitor.


Tells the SSSD to stop writing to its current debug file descriptors and to close and reopen them. This is meant to facilitate log rolling with programs like logrotate.


Tells the SSSD to simulate offline operation for one minute. This is mostly useful for testing purposes.


Tells the SSSD to go online immediately. This is mostly useful for testing purposes.


Environment variable SSS_NSS_USE_MEMCACHE

If the environment variable SSS_NSS_USE_MEMCACHE is set to "NO", client applications will not use the fast in-memory cache.

Amount of time SSSD spends in offline mode

When SSSD switches to offline mode, the amount of time before it tries to go back online will increase based upon the time spent disconnected. This value is in seconds and calculated by the following:

60 + random_offset

The random offset can increment up to 30 seconds. After each unsuccessful attempt to go online, the new interval is recalculated by the following:

new_interval = old_interval*2 + random_offset

Note that the maximum length of each interval is currently limited to one hour. If the calculated length of new_interval is greater than an hour, it will be forced to one hour.


sssd(8), sssd.conf(5), sssd-ldap(5), sssd-krb5(5), sssd-simple(5), sssd-ipa(5), sssd-ad(5), sssd-sudo(5), sss_cache(8), sss_debuglevel(8), sss_groupadd(8), sss_groupdel(8), sss_groupshow(8), sss_groupmod(8), sss_useradd(8), sss_userdel(8), sss_usermod(8), sss_obfuscate(8), sss_seed(8), sssd_krb5_locator_plugin(8), sss_ssh_authorizedkeys(8), sss_ssh_knownhostsproxy(8), sssd-ifp(5), pam_sss(8).


The SSSD upstream -

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SSSD SSSD (8) 04/16/2016

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