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This is a list of Unix daemons that are found on various Unix-like operating systems.
Most, but not all, Unix daemons have a name ending with d.
Process | Description |
---|---|
init [1] | The Unix program which spawns all other processes. As of 2016, for major Linux distributions, it has been replaced by systemd. [2] |
biod [3] | Works in cooperation with the remote nfsd to handle client NFS requests. |
crond [1] | Time-based job scheduler, runs jobs in the background. |
dhcpd | Dynamically configure TCP/IP information for clients. |
fingerd | Provides a network interface for the finger protocol, as used by the finger command. |
ftpd [1] | Services FTP requests from a remote system. |
httpd | Web server daemon. |
inetd [4] | 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 . |
lpd | The line printer daemon that manages printer spooling. |
nfsd [3] | 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. |
portmap/rpcbind | Provides information to allow ONC RPC clients to contact ONC RPC servers |
sshd | Listens for Secure Shell requests from clients. |
sendmail | SMTP daemon. |
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. |
systemd | Replacement of init, the Unix program which spawns all other processes. |
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. |