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{{refimprove|date=March 2010}}
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This is a '''list of Unix [[Daemon (computing)|daemons]]''' that are found on various [[Unix-like]] operating systems.

Most, but not all, Unix daemons have a name ending with ''d''.

{| class="wikitable"
!Process
!Description
|-
![[init]]<ref name=verma2006/>
|The Unix program which spawns all other processes. As of 2016, for major Linux distributions, it has been replaced by [[systemd]].<ref>{{cite web|url=https://www.linuxvoice.com/linux-101-get-the-most-out-of-systemd/|title=Linux 101: Get the most out of systemd|first=Mike|last=Saunders|publisher=Linux Voice|date=11 November 2015|accessdate=28 January 2016|archive-url=https://web.archive.org/web/20160529075547/https://www.linuxvoice.com/linux-101-get-the-most-out-of-systemd/|archive-date=29 May 2016|url-status=dead}}</ref>
|-
!biod<ref name=rosen_host_klee2006/>
|Works in cooperation with the remote nfsd to handle client [[Network File System|NFS]] requests.
|-
![[cron]]d<ref name=verma2006/>
|Time-based [[job scheduler]], runs jobs in the background.
|-
![[Dynamic Host Configuration Protocol|dhcpd]]
|Dynamically configure TCP/IP information for clients.
|-
![[Finger (protocol)|fingerd]]
|Provides a network interface for the [[Finger (protocol)|finger protocol]], as used by the ''finger'' command.
|-
![[File Transfer Protocol|ftp]]d<ref name=verma2006/>
|Services [[File Transfer Protocol|FTP]] requests from a remote system.
|-
![[HTTP|httpd]]
|[[Web server]] daemon.
|-
![[inetd]]<ref name=stevens_fenner_rudocc2004/>
|Listens for network connection requests. If a request is accepted, it can launch a background daemon to handle the request, was known as the super server for this reason. Some systems use the replacement command '''[[xinetd]]'''.
|-
![[Line Printer Daemon protocol|lpd]]
|The [[Line Printer Daemon protocol|line printer daemon]] that manages printer spooling.
|-
![[Network File System|nfsd]]<ref name=rosen_host_klee2006/>
|Processes [[Network File System|NFS]] operation requests from client systems. Historically each nfsd daemon handled one request at a time, so it was normal to start multiple copies.
|-
!ntpd
|[[Network Time Protocol]] daemon that manages clock synchronization across the network. '''xntpd''' implements the version 3 standard of NTP.
|-
![[portmap]]/rpcbind
|Provides information to allow [[Sun RPC|ONC RPC]] clients to contact ONC RPC servers
|-
!sshd
|Listens for [[Secure Shell]] requests from clients.
|-
![[sendmail]]
|[[Simple Mail Transfer Protocol|SMTP]] daemon.
|-
!swapper
|Copies process regions to [[Virtual memory|swap]] space in order to reclaim physical [[memory paging|pages]] of [[computer storage|memory]] for the [[Kernel (operating system)|kernel]]. Also called '''sched'''.
|-
![[syslog]]d
|System logger process that collects various system messages.
|-
!syncd
|Periodically keeps the [[file system]]s synchronized with system memory.
|-
![[systemd]]
|Replacement of [[init]], the Unix program which spawns all other processes.
|-
|-
![[X Font Server|xfsd]]
|Serve [[X Window System|X11]] [[font]]s to remote clients.
|-
!vhand
|Releases pages of memory for use by other processes. Also known as the "page stealing daemon"
|-
!ypbind
|Find the server for an [[Network Information Service|NIS]] domain and store the information in a file.
|}

==See also==
*[[List of POSIX commands]]
{{Clear}}

==References==
{{reflist|refs=

<ref name=verma2006>{{citation | first=Archna | last=Verma | year=2006 | title=Unix and Shell Programming | page=84 | publisher=Laxmi Publications | isbn=81-7008-958-1 | url=https://books.google.com/books?id=JhS-TkW0tOYC&pg=PA84 }}</ref>

<ref name=rosen_host_klee2006>{{citation | first1=Kenneth H. | last1=Rosen | first2=Douglas A. | last2=Host | first3=Rachel | last3=Klee | page=514 | title=UNIX: the complete reference | year=2006 | series=Complete Reference Series | edition=2nd | publisher=McGraw-Hill Professional | isbn=0-07-226336-9 | url=https://books.google.com/books?id=2Et--84HIkwC&pg=PA514 }}</ref>

<ref name=stevens_fenner_rudocc2004>{{citation | first1=W. Richard | last1=Stevens | first2=Bill | last2=Fenner | first3=Andrew M. | last3=Rudoff | page=372 | title=UNIX Network Programming: The sockets networking API | series=Addison-Wesley professional computing series | edition=3rd | publisher=Addison-Wesley Professional | year=2004 | isbn=0-13-141155-1 | url=https://books.google.com/books?id=ptSC4LpwGA0C&pg=PA372 }}</ref>

}}

[[Category:Unix]]
[[Category:Lists of software|Unix daemons]]

List of Unix daemons - Revision history

imported>Stevebroshar: Edit for clarity