Difference between revisions of "Daemons"

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(Add status reporting.)
(List of daemons: update 2 "not yet implemented" lines. remove one unmaintained/deprecated program)
 
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A [[Wikipedia:Daemon (computing)|daemon]] is a program that runs in the background, waiting for events to occur and offering services. A good example is a web server that waits for a request to deliver a page or a ssh server waiting for someone trying to log in. While these are full featured applications, there are daemons whose work is not that visible. Daemons are for tasks like writing messages into a log file (e.g. {{ic|syslog}}, {{ic|metalog}}) or keeping your system time accurate (e.g. [[Network Time Protocol daemon|{{ic|ntpd}}]]). For more information see {{ic|man 7 daemon}}.
+
A [[Wikipedia:Daemon (computing)|daemon]] is a program that runs as a "background" process (without a terminal or user interface), commonly waiting for events to occur and offering services. A good example is a web server that waits for a request to deliver a page, or a ssh server waiting for someone trying to log in. While these are full featured applications, there are daemons whose work is not that visible. Daemons are for tasks like writing messages into a log file (e.g. {{ic|syslog}}, {{ic|metalog}}) or keeping your system time accurate (e.g. [[ntpd]]). For more information see {{ic|man 7 daemon}}.
  
{{Note|The word daemon is sometimes used for a class of programs that are started at boot but have no process which remains in memory.  They are called daemons simply because they utilize the same startup/shutdown framework (e.g. systemd service files of Type oneshot) used to start traditional daemons. For example, the service files for {{ic|alsa-store}} and {{ic|alsa-restore}} provide persistent configuration support but do not start additional background processes to service requests or respond to events.
+
In Arch Linux, daemons are managed by [[systemd]]. The [[systemd#Basic systemctl usage|systemctl]] command is the user interface used to manage them. It reads {{ic|''name''.service}} files that contain information about how and when to start the associated daemon. Service files are stored in {{ic|/{etc,usr/lib,run}/systemd/system}}. See [[systemd#Using units]] for details.
  
From the user's perspective the distinction is typically not significant unless the user tries to look for the "daemon" in a process list.
+
== List of daemons ==
}}
+
  
==Managing daemons==
+
Here is a list of daemons. Note that any package can provide a daemon, so this list will never be complete. Please feel free to add any missing daemons here, in alphabetical order. You may have packages that include other daemons from the [[AUR]]. These files will likely be located in {{ic|/usr/lib/systemd/system/}}.
In Arch Linux, daemons are handled by [[systemd]]. The ''systemctl'' command is used to control them.
+
 +
The ''Package'' column contains a link to ArchWiki page for each daemon (or link to the package if no such page exists). The ''initscripts'' column contains the name of the legacy ''rc.d'' script and the ''systemd'' column contains the name of the [[systemd]] service file. Note that there may be daemons specific to either initscripts or systemd, with the respective column empty. The ''Description'' column provides short description, preferably of ''the daemon'' (not of the package).
  
===Starting on boot===
+
{| class="wikitable sortable"
A default install of Arch Linux will leave you with very few services (or daemons) enabled during boot. You can add or remove services to be started on boot by calling
+
! Package !! initscripts !! systemd !! Description
 +
|-
 +
| [[acpid]] || acpid || acpid.service || A daemon for delivering ACPI power management events with netlink support.
 +
|-
 +
| [[alsa]] || alsa || ''always on'' – alsa-store.service, alsa-restore.service || Saves the state of a sound card (e.g. volume) on shutdown and restores it on startup.
 +
|-
 +
| {{Pkg|at}} || atd || atd.service || Runs jobs queued for later execution.
 +
|-
 +
| [[Autofs]] || autofs || autofs.service || Automounting of removable media or network shares when they are inserted or accessed.
 +
|-
 +
| rowspan="2" | [[Avahi]] || avahi-daemon || avahi-daemon.service || Allows programs to automatically find local network services.
 +
|-
 +
|                            avahi-dnsconfd || avahi-dnsconfd.service || Multicast/unicast DNS-SD framework.
 +
|-
 +
| [[Bitlbee]] || bitlbee || bitlbee.service || Brings instant messaging (XMPP, MSN, Yahoo!, AIM, ICQ, Twitter) to IRC.
 +
|-
 +
| [[Bluetooth]] || bluetooth || bluetooth.service || Bluetooth protocol stack, framework, subsystem.
 +
|-
 +
| [[Chrony]] || chrony || chrony.service || Lightweight NTP client and server.
 +
|-
 +
| [[CDemu]] || cdemud || cdemu-daemon.service || CD/DVD-ROM device emulator.
 +
|-
 +
| [[ClamAV]] || clamav || clamd.service <br>freshclamd.service || Anti-virus toolkit for Unix.
 +
|-
 +
| [[Connman]] || connmand || connman.service || Wireless LAN network manager.
 +
|-
 +
| [[Cpupower]] || cpupower || cpupower.service || Sets [[cpufreq]] governor and other parameters on startup.
 +
|-
 +
| || craftbukkit || craftbukkit.service || CraftBukkit Minecraft server.
 +
|-
 +
| [[Cron]] || crond || cronie.service (if using {{Pkg|cronie}}) or dcron.service (if using {{AUR|dcron}}) || Daemon to schedule and time events. The daemon name ''crond'' is used by at least two packages, {{Pkg|cronie}} and {{AUR|dcron}}.
 +
|-
 +
| [[CUPS]] || cupsd || org.cups.cupsd.service || The CUPS Printing System daemon.
 +
|-
 +
| [[D-Bus]] || dbus || ''always on'' – dbus.service || Freedesktop.org message bus system.
 +
|-
 +
| {{Pkg|dante}} || sockd || sockd.service || A circuit-level SOCKS client/server.
 +
|-
 +
| rowspan="2" | [[Deluge]] || deluged || deluged.service || Cross-platform and full-featured BitTorrent client - main daemon.
 +
|-
 +
|                            deluge-web || deluge-web.service || Cross-platform and full-featured BitTorrent client - web interface daemon.
 +
|-
 +
| [[Dhcpcd]] || dhcpcd || dhcpcd@.service || DHCP daemon.
 +
|-
 +
| [[Dovecot]] || dovecot || dovecot.service || IMAP and POP3 server.
 +
|-
 +
| [[Dropbox]] || dropboxd || dropbox@.service || Cross-platform file synchronisation with version control.
 +
|-
 +
| [[fail2ban]] || fail2ban || fail2ban.service || Fail2ban scans log files and bans IP addresses that show malicious activity.
 +
|-
 +
| [[Fan speed control]] || fancontrol || fancontrol.service || Fan control daemon (part of lm_sensors)
 +
|-
 +
| [[Fbsplash]] || fbsplash || ''not yet implemented'' || Graphical boot splash screen for the user.
 +
|-
 +
| [[FluidSynth]] || fluidsynth || fluidsynth.service || Software synthesizer.
 +
|-
 +
| || ftpd || ftpd.service || inetutils FTP daemon.
 +
|-
 +
| [[GDM]] || gdm || gdm.service || GNOME Display Manager.
 +
|-
 +
| [[Git]] || git-daemon || git-daemon.socket || Git daemon.
 +
|-
 +
| [[Console mouse support|gpm]] || gpm || gpm.service || Console mouse support.
 +
|-
 +
| [[hddtemp]] || hddtemp || hddtemp.service || Hard drive temperature monitor daemon.
 +
|-
 +
| || healthd || healthd.service || A daemon which can be used to alert you in the event of a hardware health monitoring alarm (part of [[lm_sensors]]).
 +
|-
 +
| [[apache]] || httpd || httpd.service || Apache HTTP Server (Web Server).
 +
|-
 +
| || i8kmon || i8kmon.service || Monitor the CPU temperature and fan status on Dell Inspiron laptops.
 +
|-
 +
| || ifplugd || ifplugd@.service || Start/stop network on network cable plugged in/out.
 +
|-
 +
| rowspan="2" | [[iptables]] || iptables || iptables.service || Load firewall rules for IPv4.
 +
|-
 +
|                              ip6tables || ip6tables.service || Load firewall rules for IPv6.
 +
|-
 +
| || irqbalance || irqbalance.service || Irqbalance is the Linux utility tasked with making sure that interrupts from your hardware devices are handled in as efficient a manner as possible.
 +
|-
 +
| [[KDE]] || kdm || kdm.service || KDE Display Manager.
 +
|-
 +
| rowspan="3" | {{Pkg|krb5}} || krb5-kadmind || krb5-kadmind.service || Kerberos 5 administration server.
 +
|-
 +
|                      krb5-kdc || krb5-kdc.service || Kerberos 5 KDC.
 +
|-
 +
|                      krb5-kpropd || krb5-kpropd.service || Kerberos 5 propagation server.
 +
|-
 +
| [[Laptop Mode Tools]] || laptop-mode || laptop-mode.service || Laptop power saving tools.
 +
|-
 +
| [[lighttpd]] || lighttpd || lighttpd.service || Lighttpd HTTP Server (Web Server).
 +
|-
 +
| [[libvirt]] || libvirt || libvirtd.service || libvirt is a virtualization API and a daemon for managing virtual machines (VMs).
 +
|-
 +
| [[LXDE|lxdm]] || lxdm || lxdm.service || LXDE Display Manager.
 +
|-
 +
| || mdadm || mdadm.service || MD Administration (Linux software RAID).
 +
|-
 +
| [[miniDLNA]] || minidlna || minidlna.service || simple DLNA/UPnP media server.
 +
|-
 +
| || ? || ModemManager.service || Makes mobile broadband (3G) modem available to [[NetworkManager]].
 +
|-
 +
| [[mpd]] || mpd || mpd.service || Music Player Daemon.
 +
|-
 +
| [[MySQL]] || mysqld || mysqld.service || MySQL database server.
 +
|-
 +
| [[MythTV]] || mythbackend || mythbackend.service || Back-end for the MythTV digital video recording/home theater software.
 +
|-
 +
| [[BIND]] || named || named.service || The Berkeley Internet Name Daemon (BIND) DNS server.
 +
|-
 +
| rowspan="3" | [[netctl]] || || netctl@.service || Manually activate specific profile.
 +
|-
 +
|                            || netctl-ifplugd@.service || Automatically start/stop netctl profiles depending on whether the cable is plugged in or not.
 +
|-
 +
|                            || netctl-auto@.service || Automatically start/stop netctl wireless profiles depending on which access points are in range.
 +
|-
 +
| || network || dhcpcd@.service || Brings up the network connections (dynamic Ethernet).
 +
|-
 +
| [[NetworkManager]] || networkmanager || NetworkManager.service <br>NetworkManager-wait-online.service || NetworkManager daemon, provides configuration and detection for automatic network connections.
 +
|-
 +
| [[Nginx]] || nginx || nginx.service || Nginx HTTP Server and IMAP/POP3 proxy server (Web Server).
 +
|-
 +
| || nscd || nscd.service || Name service caching daemon.
 +
|-
 +
| [[ntpd]] || ntpd || ntpd.service || Network Time Protocol daemon (client and server).
 +
|-
 +
| [[Ntop]] || ntop || ntop.service || Ntop is a network traffic probe based on libcap.
 +
|-
 +
| [[OpenNTPD]] || openntpd || openntpd.service || Alternative Network Time Protocol daemon (client and server).
 +
|-
 +
| || osspd || osspd.service || OSS Userspace Bridge.
 +
|-
 +
| [[OpenVPN]] || openvpn || openvpn@.service || One for each VPN configuration file saved like {{ic|/etc/openvpn/''<profile-name>''.conf}}
 +
|-
 +
| [[OSS]] || oss || oss.service || Open Sound System. Alternative to [[ALSA]].
 +
|-
 +
| [[Pdnsd]] || pdnsd || pdnsd.service || Proxy DNS server with permanent caching.
 +
|-
 +
| {{Pkg|php-fpm}} || php-fpm || php-fpm.service || FastCGI Process Manager for PHP.
 +
|-
 +
| [[PostgreSQL]] || postgresql || postgresql.service || PostgreSQL database server.
 +
|-
 +
| [[Postfix]] || postfix || postfix.service || Mail server, which is an alternative to using [[sendmail]].
 +
|-
 +
| [[Postgrey]] || postgrey || postgrey.service || Greylisting service, used with Postfix
 +
|-
 +
| [[PPTP server]] || pptpd || pptpd.service || A Virtual Private Network (VPN) server using the Point-to-Point Tunneling Protocol (PPTP).
 +
|-
 +
| [[pppd]] || pppd || ppp@.service || A daemon which implements the Point-to-Point Protocol for dial-up networking.
 +
|-
 +
| [[preload]] || preload || preload.service || Makes applications run faster by prefetching binaries and shared objects.
 +
|-
 +
| [[Prosody]] || prosody || prosody.service || XMPP server.
 +
|-
 +
| [[Profile-sync-daemon]] || psd || psd.service || Manages your browser's profile in tmpfs and periodically syncs it back to your physical disk.
 +
|-
 +
| || pure-ftpd || pure-ftpd.servicecups.service || A fast, production quality, standards-compliant FTP server.
 +
|-
 +
| {{Pkg|rfkill}} || rfkill || rfkill-block@.service <br>rfkill-unblock@.service || (Un)blocks radio devices.
 +
|-
 +
| [[Rsync]] || rsyncd || rsyncd.service || rsync daemon.
 +
|-
 +
| [[Rsyslog]] || rsyslogd || rsyslog.service || Alternative system logger.
 +
|-
 +
| [[samba]] || samba || smbd.service<br>nmbd.service<br>winbindd.service || File and print services for Microsoft Windows clients.
 +
|-
 +
| [[SANE]] || saned || saned@.service || SANE network daemon.
 +
|-
 +
| || saslauthd || saslauthd.service || SASL authentication daemon.
 +
|-
 +
| rowspan="2" | [[lm_sensors]] || sensord || sensord.service || Sensor information logging daemon.
 +
|-
 +
|                                sensors || lm_sensors.service || Initialize hardware monitoring sensors (load necessary kernel modules).
 +
|-
 +
| [[SLiM]] || slim || slim.service || Simple Login Manager.
 +
|-
 +
| [[SMART]] || smartd || smartd.service || Self-Monitoring, Analysis, and Reporting Technology (S.M.A.R.T.) Hard Disk Monitoring.
 +
|-
 +
| [[Samba#smbnetfs|smbnetfs]] || smbnetfs || smbnetfs.service || Automatically mount Samba/Microsoft network shares.
 +
|-
 +
| [[snmpd]] || snmpd || snmpd.service || A suite of applications used to implement SNMP
 +
|-
 +
| || soundmodem || soundmodem.service || Multiplatform Soundcard Packet Radio Modem
 +
|-
 +
| {{Pkg|spamassassin}} || spamd || spamassassin.service || e-mail spam filtering service.
 +
|-
 +
| [[openssh]] || sshd || sshd.service || OpenSSH (secure shell) daemon.
 +
|-
 +
| || stunnel || stunnel.service || Allows encrypting arbitrary TCP connections inside SSL.
 +
|-
 +
| || svnserve || svnserve.service || Subversion server.
 +
|-
 +
| [[syslog-ng]] || syslog-ng || syslog-ng.service || System logger next generation.
 +
|-
 +
| [[Timidity]] || timidity++ || timidity.service || Software synthesizer for MIDI.
 +
|-
 +
| [[Tinc]] || ? || tincd@.service || One for each configuration directory like /etc/tinc/''<vpnname>''/
 +
|-
 +
| [[Tor]] || tor || tor.service || Onion routing for anonymous communication.
 +
|-
 +
|[[Transmission]] || transmissiond || transmission.service || BitTorrent Daemon.
 +
|-
 +
| [[Ufw]] || ufw || ufw.service || Uncomplicated FireWall.
 +
|-
 +
| [[Urxvt|Urxvtd]] || ? || urxvtd.service || urxvt daemon.
 +
|-
 +
| [[VirtualBox]] || vboxservice || vboxservice.service || VirtualBox Guest Service.
 +
|-
 +
| [[vnStat]] || vnstat || vnstat.service || Lightweight network traffic monitor.
 +
|-
 +
| [[Very Secure FTP Daemon]] || vsftpd || vsftpd.service (permanent)
  
# systemctl enable <name>
+
vsftpd.socket (on-demand)
  
or
+
vsftpd-ssl.service (permanent)
  
# systemctl disable <name>
+
vsftpd-ssl.socket (on-demand)
 +
|| FTP server.
 +
|-
 +
| [[wicd]] || wicd || wicd.service || A lightweight alternative to NetworkManager.
 +
|-
 +
| [[x11vnc]] || x11vnc || x11vnc.service || VNC remote desktop daemon.
 +
|-
 +
| [[XDM]] || xdm || xdm.service || X display manager.
 +
|-
 +
| [[XDM|xdm-archlinux]] || xdm-archlinux || xdm-archlinux.service || X display manager with Arch Linux theme.
 +
|-
  
The services themselves contain the necessary ordering information, so there is no need to order them manually.
+
|}
 
+
Service files are stored in {{ic|/{etc,usr/lib,run}/systemd/system}}. You can print the list of all the available services on your system, along with their current status, with:
+
$ systemctl list-unit-files
+
 
+
To see a list of running units (some of which will be daemons, among other things), type:
+
$ systemctl list-units
+
 
+
To see all available ones, add {{ic| --all}} to the end of a command.
+
 
+
===Starting manually===
+
To start or stop services at runtime, use {{ic|systemctl start<nowiki>|</nowiki>stop ''<service>''}}.
+
 
+
===Restarting===
+
To restart services, use {{ic|systemctl restart ''<service>''}}.
+
 
+
===Status reporting===
+
To report the current status of a service, use {{ic|systemctl status ''<service>''}}.
+
 
+
==List of daemons==
+
See [[Daemons List]] for a list of daemons with the name of the service and legacy rc.d script.
+
 
+
==See also==
+
* [[Systemd|systemd]]
+
* Examples for writing [[Systemd/Services]]
+

Latest revision as of 21:51, 28 December 2015

A daemon is a program that runs as a "background" process (without a terminal or user interface), commonly waiting for events to occur and offering services. A good example is a web server that waits for a request to deliver a page, or a ssh server waiting for someone trying to log in. While these are full featured applications, there are daemons whose work is not that visible. Daemons are for tasks like writing messages into a log file (e.g. syslog, metalog) or keeping your system time accurate (e.g. ntpd). For more information see man 7 daemon.

In Arch Linux, daemons are managed by systemd. The systemctl command is the user interface used to manage them. It reads name.service files that contain information about how and when to start the associated daemon. Service files are stored in /{etc,usr/lib,run}/systemd/system. See systemd#Using units for details.

List of daemons

Here is a list of daemons. Note that any package can provide a daemon, so this list will never be complete. Please feel free to add any missing daemons here, in alphabetical order. You may have packages that include other daemons from the AUR. These files will likely be located in /usr/lib/systemd/system/.

The Package column contains a link to ArchWiki page for each daemon (or link to the package if no such page exists). The initscripts column contains the name of the legacy rc.d script and the systemd column contains the name of the systemd service file. Note that there may be daemons specific to either initscripts or systemd, with the respective column empty. The Description column provides short description, preferably of the daemon (not of the package).

Package initscripts systemd Description
acpid acpid acpid.service A daemon for delivering ACPI power management events with netlink support.
alsa alsa always on – alsa-store.service, alsa-restore.service Saves the state of a sound card (e.g. volume) on shutdown and restores it on startup.
at atd atd.service Runs jobs queued for later execution.
Autofs autofs autofs.service Automounting of removable media or network shares when they are inserted or accessed.
Avahi avahi-daemon avahi-daemon.service Allows programs to automatically find local network services.
avahi-dnsconfd avahi-dnsconfd.service Multicast/unicast DNS-SD framework.
Bitlbee bitlbee bitlbee.service Brings instant messaging (XMPP, MSN, Yahoo!, AIM, ICQ, Twitter) to IRC.
Bluetooth bluetooth bluetooth.service Bluetooth protocol stack, framework, subsystem.
Chrony chrony chrony.service Lightweight NTP client and server.
CDemu cdemud cdemu-daemon.service CD/DVD-ROM device emulator.
ClamAV clamav clamd.service
freshclamd.service
Anti-virus toolkit for Unix.
Connman connmand connman.service Wireless LAN network manager.
Cpupower cpupower cpupower.service Sets cpufreq governor and other parameters on startup.
craftbukkit craftbukkit.service CraftBukkit Minecraft server.
Cron crond cronie.service (if using cronie) or dcron.service (if using dcronAUR) Daemon to schedule and time events. The daemon name crond is used by at least two packages, cronie and dcronAUR.
CUPS cupsd org.cups.cupsd.service The CUPS Printing System daemon.
D-Bus dbus always on – dbus.service Freedesktop.org message bus system.
dante sockd sockd.service A circuit-level SOCKS client/server.
Deluge deluged deluged.service Cross-platform and full-featured BitTorrent client - main daemon.
deluge-web deluge-web.service Cross-platform and full-featured BitTorrent client - web interface daemon.
Dhcpcd dhcpcd dhcpcd@.service DHCP daemon.
Dovecot dovecot dovecot.service IMAP and POP3 server.
Dropbox dropboxd dropbox@.service Cross-platform file synchronisation with version control.
fail2ban fail2ban fail2ban.service Fail2ban scans log files and bans IP addresses that show malicious activity.
Fan speed control fancontrol fancontrol.service Fan control daemon (part of lm_sensors)
Fbsplash fbsplash not yet implemented Graphical boot splash screen for the user.
FluidSynth fluidsynth fluidsynth.service Software synthesizer.
ftpd ftpd.service inetutils FTP daemon.
GDM gdm gdm.service GNOME Display Manager.
Git git-daemon git-daemon.socket Git daemon.
gpm gpm gpm.service Console mouse support.
hddtemp hddtemp hddtemp.service Hard drive temperature monitor daemon.
healthd healthd.service A daemon which can be used to alert you in the event of a hardware health monitoring alarm (part of lm_sensors).
apache httpd httpd.service Apache HTTP Server (Web Server).
i8kmon i8kmon.service Monitor the CPU temperature and fan status on Dell Inspiron laptops.
ifplugd ifplugd@.service Start/stop network on network cable plugged in/out.
iptables iptables iptables.service Load firewall rules for IPv4.
ip6tables ip6tables.service Load firewall rules for IPv6.
irqbalance irqbalance.service Irqbalance is the Linux utility tasked with making sure that interrupts from your hardware devices are handled in as efficient a manner as possible.
KDE kdm kdm.service KDE Display Manager.
krb5 krb5-kadmind krb5-kadmind.service Kerberos 5 administration server.
krb5-kdc krb5-kdc.service Kerberos 5 KDC.
krb5-kpropd krb5-kpropd.service Kerberos 5 propagation server.
Laptop Mode Tools laptop-mode laptop-mode.service Laptop power saving tools.
lighttpd lighttpd lighttpd.service Lighttpd HTTP Server (Web Server).
libvirt libvirt libvirtd.service libvirt is a virtualization API and a daemon for managing virtual machines (VMs).
lxdm lxdm lxdm.service LXDE Display Manager.
mdadm mdadm.service MD Administration (Linux software RAID).
miniDLNA minidlna minidlna.service simple DLNA/UPnP media server.
 ? ModemManager.service Makes mobile broadband (3G) modem available to NetworkManager.
mpd mpd mpd.service Music Player Daemon.
MySQL mysqld mysqld.service MySQL database server.
MythTV mythbackend mythbackend.service Back-end for the MythTV digital video recording/home theater software.
BIND named named.service The Berkeley Internet Name Daemon (BIND) DNS server.
netctl netctl@.service Manually activate specific profile.
netctl-ifplugd@.service Automatically start/stop netctl profiles depending on whether the cable is plugged in or not.
netctl-auto@.service Automatically start/stop netctl wireless profiles depending on which access points are in range.
network dhcpcd@.service Brings up the network connections (dynamic Ethernet).
NetworkManager networkmanager NetworkManager.service
NetworkManager-wait-online.service
NetworkManager daemon, provides configuration and detection for automatic network connections.
Nginx nginx nginx.service Nginx HTTP Server and IMAP/POP3 proxy server (Web Server).
nscd nscd.service Name service caching daemon.
ntpd ntpd ntpd.service Network Time Protocol daemon (client and server).
Ntop ntop ntop.service Ntop is a network traffic probe based on libcap.
OpenNTPD openntpd openntpd.service Alternative Network Time Protocol daemon (client and server).
osspd osspd.service OSS Userspace Bridge.
OpenVPN openvpn openvpn@.service One for each VPN configuration file saved like /etc/openvpn/<profile-name>.conf
OSS oss oss.service Open Sound System. Alternative to ALSA.
Pdnsd pdnsd pdnsd.service Proxy DNS server with permanent caching.
php-fpm php-fpm php-fpm.service FastCGI Process Manager for PHP.
PostgreSQL postgresql postgresql.service PostgreSQL database server.
Postfix postfix postfix.service Mail server, which is an alternative to using sendmail.
Postgrey postgrey postgrey.service Greylisting service, used with Postfix
PPTP server pptpd pptpd.service A Virtual Private Network (VPN) server using the Point-to-Point Tunneling Protocol (PPTP).
pppd pppd ppp@.service A daemon which implements the Point-to-Point Protocol for dial-up networking.
preload preload preload.service Makes applications run faster by prefetching binaries and shared objects.
Prosody prosody prosody.service XMPP server.
Profile-sync-daemon psd psd.service Manages your browser's profile in tmpfs and periodically syncs it back to your physical disk.
pure-ftpd pure-ftpd.servicecups.service A fast, production quality, standards-compliant FTP server.
rfkill rfkill rfkill-block@.service
rfkill-unblock@.service
(Un)blocks radio devices.
Rsync rsyncd rsyncd.service rsync daemon.
Rsyslog rsyslogd rsyslog.service Alternative system logger.
samba samba smbd.service
nmbd.service
winbindd.service
File and print services for Microsoft Windows clients.
SANE saned saned@.service SANE network daemon.
saslauthd saslauthd.service SASL authentication daemon.
lm_sensors sensord sensord.service Sensor information logging daemon.
sensors lm_sensors.service Initialize hardware monitoring sensors (load necessary kernel modules).
SLiM slim slim.service Simple Login Manager.
SMART smartd smartd.service Self-Monitoring, Analysis, and Reporting Technology (S.M.A.R.T.) Hard Disk Monitoring.
smbnetfs smbnetfs smbnetfs.service Automatically mount Samba/Microsoft network shares.
snmpd snmpd snmpd.service A suite of applications used to implement SNMP
soundmodem soundmodem.service Multiplatform Soundcard Packet Radio Modem
spamassassin spamd spamassassin.service e-mail spam filtering service.
openssh sshd sshd.service OpenSSH (secure shell) daemon.
stunnel stunnel.service Allows encrypting arbitrary TCP connections inside SSL.
svnserve svnserve.service Subversion server.
syslog-ng syslog-ng syslog-ng.service System logger next generation.
Timidity timidity++ timidity.service Software synthesizer for MIDI.
Tinc  ? tincd@.service One for each configuration directory like /etc/tinc/<vpnname>/
Tor tor tor.service Onion routing for anonymous communication.
Transmission transmissiond transmission.service BitTorrent Daemon.
Ufw ufw ufw.service Uncomplicated FireWall.
Urxvtd  ? urxvtd.service urxvt daemon.
VirtualBox vboxservice vboxservice.service VirtualBox Guest Service.
vnStat vnstat vnstat.service Lightweight network traffic monitor.
Very Secure FTP Daemon vsftpd vsftpd.service (permanent)

vsftpd.socket (on-demand)

vsftpd-ssl.service (permanent)

vsftpd-ssl.socket (on-demand)

FTP server.
wicd wicd wicd.service A lightweight alternative to NetworkManager.
x11vnc x11vnc x11vnc.service VNC remote desktop daemon.
XDM xdm xdm.service X display manager.
xdm-archlinux xdm-archlinux xdm-archlinux.service X display manager with Arch Linux theme.