# SYSTEMD.TARGET(5) - man - phpMan

[SYSTEMD.TARGET(5)](https://www.chedong.com/phpMan.php/man/SYSTEMD.TARGET/5/markdown)                          systemd.target                          [SYSTEMD.TARGET(5)](https://www.chedong.com/phpMan.php/man/SYSTEMD.TARGET/5/markdown)



## NAME
       systemd.target - Target unit configuration

## SYNOPSIS
       _target_.target

## DESCRIPTION
       A unit configuration file whose name ends in ".target" encodes information about a target
       unit of systemd, which is used for grouping units and as well-known synchronization points
       during start-up.

       This unit type has no specific options. See [**systemd.unit**(5)](https://www.chedong.com/phpMan.php/man/systemd.unit/5/markdown) for the common options of all
       unit configuration files. The common configuration items are configured in the generic [Unit]
       and [Install] sections. A separate [Target] section does not exist, since no target-specific
       options may be configured.

       Target units do not offer any additional functionality on top of the generic functionality
       provided by units. They exist merely to group units via dependencies (useful as boot
       targets), and to establish standardized names for synchronization points used in dependencies
       between units. Among other things, target units are a more flexible replacement for SysV
       runlevels in the classic SysV init system. (And for compatibility reasons special target
       units such as runlevel3.target exist which are used by the SysV runlevel compatibility code
       in systemd. See [**systemd.special**(7)](https://www.chedong.com/phpMan.php/man/systemd.special/7/markdown) for details).

## AUTOMATIC DEPENDENCIES
### Implicit Dependencies
       There are no implicit dependencies for target units.

### Default Dependencies
       The following dependencies are added unless _DefaultDependencies=no_ is set:

       •   Target units will automatically complement all configured dependencies of type _Wants=_ or
           _Requires=_ with dependencies of type _After=_ unless _DefaultDependencies=no_ is set in the
           specified units. Note that _Wants=_ or _Requires=_ must be defined in the target unit itself
           — if you for example define _Wants=_some.target in some.service, the automatic ordering
           will not be added.

       •   Target units automatically gain _Conflicts=_ and _Before=_ dependencies against
           shutdown.target.

## EXAMPLE
### Example 1. Simple standalone target

           # emergency-net.target

           [Unit]
           Description=Emergency Mode with Networking
           Requires=emergency.target systemd-networkd.service
           After=emergency.target systemd-networkd.service
           AllowIsolate=yes

       When adding dependencies to other units, it's important to check if they set
       _DefaultDependencies=_. Service units, unless they set _DefaultDependencies=no_, automatically
       get a dependency on sysinit.target. In this case, both emergency.target and
       systemd-networkd.service have _DefaultDependencies=no_, so they are suitable for use in this
       target, and do not pull in sysinit.target.

       You can now switch into this emergency mode by running _systemctl_ _isolate_ _emergency-net.target_
       or by passing the option _systemd.unit=emergency-net.target_ on the kernel command line.

       Other units can have _WantedBy=emergency-net.target_ in the _[Install]_ section. After they are
       enabled using **systemctl** **enable**, they will be started before _emergency-net.target_ is started.
       It is also possible to add arbitrary units as dependencies of emergency.target without
       modifying them by using **systemctl** **add-wants**.

## SEE ALSO
       [**systemd**(1)](https://www.chedong.com/phpMan.php/man/systemd/1/markdown), [**systemctl**(1)](https://www.chedong.com/phpMan.php/man/systemctl/1/markdown), [**systemd.unit**(5)](https://www.chedong.com/phpMan.php/man/systemd.unit/5/markdown), [**systemd.special**(7)](https://www.chedong.com/phpMan.php/man/systemd.special/7/markdown), [**systemd.directives**(7)](https://www.chedong.com/phpMan.php/man/systemd.directives/7/markdown)



systemd 249                                                                        [SYSTEMD.TARGET(5)](https://www.chedong.com/phpMan.php/man/SYSTEMD.TARGET/5/markdown)