Section 5: file formats
systemd.slice – Slice unit configuration Synopsis slice.slice Description A unit configuration file whose name ends in ".slice" encodes information about a slice unit. A slice unit is a concept for hierarchically managing resources of a group of processes. This management is performed by creating a node in the Linux Control Group (cgroup) tree. Units that…
systemd.service – Service unit configuration Synopsis service.service Description A unit configuration file whose name ends in ".service" encodes information about a process controlled and supervised by systemd. This man page lists the configuration options specific to this unit type. See systemd.unit(5) for the common options of all unit configuration files. The common configuration items are…
systemd.scope – Scope unit configuration Synopsis scope.scope Description Scope units are not configured via unit configuration files, but are only created programmatically using the bus interfaces of systemd. They are named similar to filenames. A unit whose name ends in ".scope" refers to a scope unit. Scopes units manage a set of system processes. Unlike…
systemd.resource-control – Resource control unit settings Synopsis slice.slice, scope.scope, service.service, socket.socket, mount.mount, swap.swap Description Unit configuration files for services, slices, scopes, sockets, mount points, and swap devices share a subset of configuration options for resource control of spawned processes. Internally, this relies on the Linux Control Groups (cgroups) kernel concept for organizing processes in a…
systemd.preset – Service enablement presets Synopsis /etc/systemd/system-preset/*.preset /run/systemd/system-preset/*.preset /lib/systemd/system-preset/*.preset /etc/systemd/user-preset/*.preset /run/systemd/user-preset/*.preset /usr/lib/systemd/user-preset/*.preset Description Preset files may be used to encode policy which units shall be enabled by default and which ones shall be disabled. They are read by systemctl preset which uses this information to enable or disable a unit. Depending on that policy, systemctl…
dnssec-trust-anchors.d, systemd.positive, systemd.negative – DNSSEC trust anchor configuration files Synopsis /etc/dnssec-trust-anchors.d/*.positive /run/dnssec-trust-anchors.d/*.positive /usr/lib/dnssec-trust-anchors.d/*.positive /etc/dnssec-trust-anchors.d/*.negative /run/dnssec-trust-anchors.d/*.negative /usr/lib/dnssec-trust-anchors.d/*.negative Description The DNSSEC trust anchor configuration files define positive and negative trust anchors systemd-resolved.service(8) bases DNSSEC integrity proofs on. Positive Trust Anchors Positive trust anchor configuration files contain DNSKEY and DS resource record definitions to use as base for…
systemd.unit – Unit configuration Synopsis service.service, socket.socket, device.device, mount.mount, automount.automount, swap.swap, target.target, path.path, timer.timer, snapshot.snapshot, slice.slice, scope.scope /etc/systemd/system/* /run/systemd/system/* /usr/lib/systemd/system/* … $XDG_CONFIG_HOME/systemd/user/* $HOME/.config/systemd/user/* /etc/systemd/user/* $XDG_RUNTIME_DIR/systemd/user/* /run/systemd/user/* $XDG_DATA_HOME/systemd/user/* $HOME/.local/share/systemd/user/* /usr/lib/systemd/user/* … Description A unit configuration file encodes information about a service, a socket, a device, a mount point, an automount point, a swap file or partition,…
systemd.path – Path unit configuration Synopsis path.path Description A unit configuration file whose name ends in ".path" encodes information about a path monitored by systemd, for path-based activation. This man page lists the configuration options specific to this unit type. See systemd.unit(5) for the common options of all unit configuration files. The common configuration items…
systemd.network – Network configuration Synopsis network.network Description A plain ini-style text file that encodes network configuration for matching network interfaces, used by systemd-networkd(8). See systemd.syntax(7) for a general description of the syntax. The main network file must have the extension .network; other extensions are ignored. Networks are applied to links whenever the links appear. The…
systemd.netdev – Virtual Network Device configuration Synopsis netdev.netdev Description A plain ini-style text file that encodes configuration about a virtual network device, used by systemd-networkd(8). See systemd.syntax(7) for a general description of the syntax. The main Virtual Network Device file must have the extension .netdev; other extensions are ignored. Virtual network devices are created as…
dnssec-trust-anchors.d, systemd.positive, systemd.negative – DNSSEC trust anchor configuration files Synopsis /etc/dnssec-trust-anchors.d/*.positive /run/dnssec-trust-anchors.d/*.positive /usr/lib/dnssec-trust-anchors.d/*.positive /etc/dnssec-trust-anchors.d/*.negative /run/dnssec-trust-anchors.d/*.negative /usr/lib/dnssec-trust-anchors.d/*.negative Description The DNSSEC trust anchor configuration files define positive and negative trust anchors systemd-resolved.service(8) bases DNSSEC integrity proofs on. Positive Trust Anchors Positive trust anchor configuration files contain DNSKEY and DS resource record definitions to use as base for…
systemd.mount – Mount unit configuration Synopsis mount.mount Description A unit configuration file whose name ends in ".mount" encodes information about a file system mount point controlled and supervised by systemd. This man page lists the configuration options specific to this unit type. See systemd.unit(5) for the common options of all unit configuration files. The common…
systemd.link – Network device configuration Synopsis link.link Description A plain ini-style text file that encodes configuration for matching network devices, used by systemd-udevd(8) and in particular its net_setup_link builtin. See systemd.syntax(7) for a general description of the syntax. The link files are read from the files located in the system network directory /lib/systemd/network, the volatile…
systemd.kill – Process killing procedure configuration Synopsis service.service, socket.socket, mount.mount, swap.swap, scope.scope Description Unit configuration files for services, sockets, mount points, swap devices and scopes share a subset of configuration options which define the killing procedure of processes belonging to the unit. This man page lists the configuration options shared by these five unit types….
systemd.exec – Execution environment configuration Synopsis service.service, socket.socket, mount.mount, swap.swap Description Unit configuration files for services, sockets, mount points, and swap devices share a subset of configuration options which define the execution environment of spawned processes. This man page lists the configuration options shared by these four unit types. See systemd.unit(5) for the common options…
systemd.dnssd – DNS-SD configuration Synopsis network_service.dnssd Description DNS-SD setup is performed by systemd-resolved(8). The main network service file must have the extension .dnssd; other extensions are ignored. The .dnssd files are read from the files located in the system network directories /usr/lib/systemd/dnssd and /usr/local/lib/systemd/dnssd, the volatile runtime network directory /run/systemd/dnssd and the local administration network…
systemd.device – Device unit configuration Synopsis device.device Description A unit configuration file whose name ends in ".device" encodes information about a device unit as exposed in the sysfs/udev(7) device tree. This may be used to define dependencies between devices and other units. This unit type has no specific options. See systemd.unit(5) for the common options…
systemd.automount – Automount unit configuration Synopsis automount.automount Description A unit configuration file whose name ends in ".automount" encodes information about a file system automount point controlled and supervised by systemd. This man page lists the configuration options specific to this unit type. See systemd.unit(5) for the common options of all unit configuration files. The common…
systemd-system.conf, systemd-user.conf – System and session service manager configuration file Synopsis /etc/systemd/system.conf /etc/systemd/user.conf Description When run as system instance systemd reads the configuration file system.conf, otherwise user.conf. These configuration files contain a few settings controlling basic manager operations. Options All options are configured in the "[Manager]" section: LogLevel=, LogTarget=, LogColor=, LogLocation=, DumpCore=yes, CrashShell=no, ShowStatus=yes, CrashChVT=1,…
systemd-system.conf, system.conf.d, systemd-user.conf, user.conf.d – System and session service manager configuration files Synopsis /etc/systemd/system.conf, /etc/systemd/system.conf.d/*.conf, /run/systemd/system.conf.d/*.conf, /lib/systemd/system.conf.d/*.conf ~/.config/systemd/user.conf, /etc/systemd/user.conf, /etc/systemd/user.conf.d/*.conf, /run/systemd/user.conf.d/*.conf, /usr/lib/systemd/user.conf.d/*.conf Description When run as a system instance, systemd interprets the configuration file system.conf and the files in system.conf.d directories; when run as a user instance, it interprets the configuration file user.conf (either in…