# phpman > man > systemd-networkd(8)

[SYSTEMD-NETWORKD.SERVICE(8)](https://www.chedong.com/phpMan.php/man/SYSTEMD-NETWORKD.SERVICE/8/markdown)           systemd-networkd.service           [SYSTEMD-NETWORKD.SERVICE(8)](https://www.chedong.com/phpMan.php/man/SYSTEMD-NETWORKD.SERVICE/8/markdown)



## NAME
       systemd-networkd.service, systemd-networkd - Network manager

## SYNOPSIS
       systemd-networkd.service

       /lib/systemd/systemd-networkd

## DESCRIPTION
       **systemd-networkd** is a system service that manages networks. It detects and configures network
       devices as they appear, as well as creating virtual network devices.

       To configure low-level link settings independently of networks, see [**systemd.link**(5)](https://www.chedong.com/phpMan.php/man/systemd.link/5/markdown).

       **systemd-networkd** will create network devices based on the configuration in [**systemd.netdev**(5)](https://www.chedong.com/phpMan.php/man/systemd.netdev/5/markdown)
       files, respecting the [Match] sections in those files.

       **systemd-networkd** will manage network addresses and routes for any link for which it finds a
       .network file with an appropriate [Match] section, see [**systemd.network**(5)](https://www.chedong.com/phpMan.php/man/systemd.network/5/markdown). For those links,
       it will flush existing network addresses and routes when bringing up the device. Any links
       not matched by one of the .network files will be ignored. It is also possible to explicitly
       tell systemd-networkd to ignore a link by using _Unmanaged=yes_ option, see [**systemd.network**(5)](https://www.chedong.com/phpMan.php/man/systemd.network/5/markdown).

       When systemd-networkd exits, it generally leaves existing network devices and configuration
       intact. This makes it possible to transition from the initramfs and to restart the service
       without breaking connectivity. This also means that when configuration is updated and
       systemd-networkd is restarted, netdev interfaces for which configuration was removed will not
       be dropped, and may need to be cleaned up manually.

       **systemd-networkd** may be introspected and controlled at runtime using [**networkctl**(1)](https://www.chedong.com/phpMan.php/man/networkctl/1/markdown).

## CONFIGURATION FILES
       The configuration files are read from the files located in the system network directory
       /lib/systemd/network, the volatile runtime network directory /run/systemd/network and the
       local administration network directory /etc/systemd/network.

       Networks are configured in .network files, see [**systemd.network**(5)](https://www.chedong.com/phpMan.php/man/systemd.network/5/markdown), and virtual network
       devices are configured in .netdev files, see [**systemd.netdev**(5)](https://www.chedong.com/phpMan.php/man/systemd.netdev/5/markdown).

## SEE ALSO
       [**networkctl**(1)](https://www.chedong.com/phpMan.php/man/networkctl/1/markdown), [**systemd**(1)](https://www.chedong.com/phpMan.php/man/systemd/1/markdown), [**systemd.link**(5)](https://www.chedong.com/phpMan.php/man/systemd.link/5/markdown), [**systemd.network**(5)](https://www.chedong.com/phpMan.php/man/systemd.network/5/markdown), [**systemd.netdev**(5)](https://www.chedong.com/phpMan.php/man/systemd.netdev/5/markdown), **systemd-**
       [**networkd-wait-online.service**(8)](https://www.chedong.com/phpMan.php/man/networkd-wait-online.service/8/markdown), [**systemd-network-generator.service**(8)](https://www.chedong.com/phpMan.php/man/systemd-network-generator.service/8/markdown)



systemd 249                                                              [SYSTEMD-NETWORKD.SERVICE(8)](https://www.chedong.com/phpMan.php/man/SYSTEMD-NETWORKD.SERVICE/8/markdown)