'\" t .TH "SYSTEMD\&.SLICE" "5" "" "systemd 254" "systemd.slice" .\" ----------------------------------------------------------------- .\" * Define some portability stuff .\" ----------------------------------------------------------------- .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" http://bugs.debian.org/507673 .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" ----------------------------------------------------------------- .\" * set default formatting .\" ----------------------------------------------------------------- .\" disable hyphenation .nh .\" disable justification (adjust text to left margin only) .ad l .\" ----------------------------------------------------------------- .\" * MAIN CONTENT STARTS HERE * .\" ----------------------------------------------------------------- .SH "NAME" systemd.slice \- Slice unit configuration .SH "SYNOPSIS" .PP \fIslice\fR\&.slice .SH "DESCRIPTION" .PP 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 manage processes (primarily scope and service units) may be assigned to a specific slice\&. For each slice, certain resource limits may be set that apply to all processes of all units contained in that slice\&. Slices are organized hierarchically in a tree\&. The name of the slice encodes the location in the tree\&. The name consists of a dash\-separated series of names, which describes the path to the slice from the root slice\&. The root slice is named \-\&.slice\&. Example: foo\-bar\&.slice is a slice that is located within foo\&.slice, which in turn is located in the root slice \-\&.slice\&. .PP Note that slice units cannot be templated, nor is possible to add multiple names to a slice unit by creating additional symlinks to its unit file\&. .PP By default, service and scope units are placed in system\&.slice, virtual machines and containers registered with \fBsystemd-machined\fR(8) are found in machine\&.slice, and user sessions handled by \fBsystemd-logind\fR(8) in user\&.slice\&. See \fBsystemd.special\fR(7) for more information\&. .PP See \fBsystemd.unit\fR(5) for the common options of all unit configuration files\&. The common configuration items are configured in the generic [Unit] and [Install] sections\&. The slice specific configuration options are configured in the [Slice] section\&. Currently, only generic resource control settings as described in \fBsystemd.resource-control\fR(5) are allowed\&. .PP See the \m[blue]\fBNew Control Group Interfaces\fR\m[]\&\s-2\u[1]\d\s+2 for an introduction on how to make use of slice units from programs\&. .SH "AUTOMATIC DEPENDENCIES" .SS "Implicit Dependencies" .PP The following dependencies are implicitly added: .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} Slice units automatically gain dependencies of type \fIAfter=\fR and \fIRequires=\fR on their immediate parent slice unit\&. .RE .SS "Default Dependencies" .PP The following dependencies are added unless \fIDefaultDependencies=no\fR is set: .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} Slice units will automatically have dependencies of type \fIConflicts=\fR and \fIBefore=\fR on shutdown\&.target\&. These ensure that slice units are removed prior to system shutdown\&. Only slice units involved with late system shutdown should disable \fIDefaultDependencies=\fR option\&. .RE .SH "OPTIONS" .PP Slice unit files may include [Unit] and [Install] sections, which are described in \fBsystemd.unit\fR(5)\&. No options specific to this file type are supported\&. .SH "SEE ALSO" .PP \fBsystemd\fR(1), \fBsystemd.unit\fR(5), \fBsystemd.resource-control\fR(5), \fBsystemd.service\fR(5), \fBsystemd.scope\fR(5), \fBsystemd.special\fR(7), \fBsystemd.directives\fR(7) .SH "NOTES" .IP " 1." 4 New Control Group Interfaces .RS 4 \%https://www.freedesktop.org/wiki/Software/systemd/ControlGroupInterface .RE