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Other namesSystem Security Services Daemon
Initial releaseDecember 18, 2009; 13 years ago (2009-12-18)
Stable release
2.8.2 / December 9, 2022; 4 months ago (2022-12-09)
Written inC

The System Security Services Daemon (SSSD) is software originally developed for the Linux operating system (OS) that provides a set of daemons to manage access to remote directory services and authentication mechanisms.[1] The beginnings of SSSD lie in the open-source software project FreeIPA (Identity, Policy and Audit).[2] The purpose of SSSD is to simplify system administration of authenticated and authorised user access involving multiple distinct hosts.[3] It is intended to provide single sign-on capabilities to networks based on Unix-like OSs that are similar in effect to the capabilities provided by Microsoft Active Directory Domain Services to Microsoft Windows networks.[4]


  1. ^ "13.2. Using and Caching Credentials with SSSD". Retrieved 2016-09-12.
  2. ^ Lawrence Kearney (2014). "Introducing SSSD: You Should See Polyscheme PAM" (PDF). OPEN HORIZONS MAGAZINE. No. 27. p. 28-34.
  3. ^ "Features/SSSD - FedoraProject". Retrieved 2016-09-12.
  4. ^ "SSSD vs Winbind – Red Hat Enterprise Linux Blog". Retrieved 2016-09-12.