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systemd-timesyncd.service(8) [bsd man page]

SYSTEMD-TIMESYNCD.SERVICE(8)				     systemd-timesyncd.service				      SYSTEMD-TIMESYNCD.SERVICE(8)

NAME
systemd-timesyncd.service, systemd-timesyncd - Network Time Synchronization SYNOPSIS
systemd-timesyncd.service /lib/systemd/systemd-timesyncd DESCRIPTION
systemd-timesyncd is a system service that may be used to synchronize the local system clock with a remote Network Time Protocol server. It also saves the local time to disk every time the clock has been synchronized and uses this to possibly advance the system realtime clock on subsequent reboots to ensure it monotonically advances even if the system lacks a battery-buffered RTC chip. The systemd-timesyncd service specifically implements only SNTP. This minimalistic service will set the system clock for large offsets or slowly adjust it for smaller deltas. More complex use cases are not covered by systemd-timesyncd. The NTP servers contacted are determined from the global settings in timesyncd.conf(5), the per-link static settings in .network files, and the per-link dynamic settings received over DHCP. See systemd.network(5) for more details. timedatectl(1)'s set-ntp command may be used to enable and start, or disable and stop this service. FILES
/var/lib/systemd/timesync/clock This file contains the timestamp of the last successful synchronization. SEE ALSO
systemd(1), timesyncd.conf(5), systemd.network(5), systemd-networkd.service(8), timedatectl(1), localtime(5), hwclock(8) systemd 237 SYSTEMD-TIMESYNCD.SERVICE(8)

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SYSTEMD-NETWORKD.SERVICE(8)                                  systemd-networkd.service                                  SYSTEMD-NETWORKD.SERVICE(8)

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). systemd-networkd will create network devices based on the configuration in systemd.netdev(5) 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). 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). When systemd-networkd exits, it generally leaves existing network devices and configuration intact. This makes it possible to transition from the initrams 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. 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), and virtual network devices are configured in .netdev files, see systemd.netdev(5). SEE ALSO
systemd(1), systemd.link(5), systemd.network(5), systemd.netdev(5), systemd-networkd-wait-online.service(8) systemd 237 SYSTEMD-NETWORKD.SERVICE(8)

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