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Editing File: /usr/lib/systemd/system/systemd-timesyncd.service

#  SPDX-License-Identifier: LGPL-2.1-or-later
#
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.

[Unit]
Description=Network Time Synchronization
Documentation=man:systemd-timesyncd.service(8)
ConditionCapability=CAP_SYS_TIME
ConditionVirtualization=!container
DefaultDependencies=no
After=systemd-sysusers.service
Before=time-set.target sysinit.target shutdown.target
Conflicts=shutdown.target
Wants=time-set.target

[Service]
AmbientCapabilities=CAP_SYS_TIME
BusName=org.freedesktop.timesync1
CapabilityBoundingSet=CAP_SYS_TIME
# Turn off DNSSEC validation for hostname look-ups, since those need the
# correct time to work, but we likely won't acquire that without NTP. Let's
# break this chicken-and-egg cycle here.
Environment=SYSTEMD_NSS_RESOLVE_VALIDATE=0
ExecStart=!!/lib/systemd/systemd-timesyncd
LockPersonality=yes
MemoryDenyWriteExecute=yes
NoNewPrivileges=yes
PrivateDevices=yes
PrivateTmp=yes
ProtectProc=invisible
ProtectControlGroups=yes
ProtectHome=yes
ProtectHostname=yes
ProtectKernelLogs=yes
ProtectKernelModules=yes
ProtectKernelTunables=yes
ProtectSystem=strict
Restart=always
RestartSec=0
RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
RestrictNamespaces=yes
RestrictRealtime=yes
RestrictSUIDSGID=yes
RuntimeDirectory=systemd/timesync
StateDirectory=systemd/timesync
SystemCallArchitectures=native
SystemCallErrorNumber=EPERM
SystemCallFilter=@system-service @clock
Type=notify
User=systemd-timesync
WatchdogSec=3min

[Install]
WantedBy=sysinit.target
Alias=dbus-org.freedesktop.timesync1.service

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