List of Unix daemons

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This is a list of Unix daemons that are found on various flavors of Unix. Unix daemons will typically consist of an abbreviation ending with a d. The current state of these processes can be listed with the full-output option of the process status (ps) command.

Process Description
init The Unix program which spawns all other processes.
biod Works in cooperation with the remote nfsd to handle client NFS requests.
dhcpd Dynamically configure TCP/IP information for clients.
fingerd Provides a network interface for the finger protocol, as used by the finger command.
ftpd Services FTP requests from a remote system. It listens at the port specified in the services file for ftp.
httpd Web server daemon.
inetd Listens for network connection requests. If a request is accepted, it can launch a background daemon to handle the request. Some systems use the replacement command xinetd.
lpd The line printer daemon that manage printer spooling.
nfsd Processes 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.
rpcbind Handles conversion of remote procedure calls (RPC), such as from ypbind.
sshd Listens for secure shell requests from clients.
swapper Copies process regions to swap space in order to reclaim physical pages of memory for the kernel. Also called sched.
syslogd System logger process that collects various system messages.
syncd Periodically keeps the file systems synchronized with system memory.
xfsd Serve X11 fonts 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 NIS domain and store the information in a file.

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