{
    "mode": "man",
    "parameter": "systemd-timedated",
    "section": "8",
    "url": "https://www.chedong.com/phpMan.php/man/systemd-timedated/8/json",
    "generated": "2026-06-14T13:14:41Z",
    "synopsis": "systemd-timedated.service\n/lib/systemd/systemd-timedated",
    "sections": {
        "NAME": {
            "content": "systemd-timedated.service, systemd-timedated - Time and date bus mechanism\n",
            "subsections": []
        },
        "SYNOPSIS": {
            "content": "systemd-timedated.service\n\n/lib/systemd/systemd-timedated\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "systemd-timedated.service is a system service that may be used as a mechanism to change the\nsystem clock and timezone, as well as to enable/disable network time synchronization.\nsystemd-timedated is automatically activated on request and terminates itself when it is\nunused.\n\nThe tool timedatectl(1) is a command line client to this service.\n\nsystemd-timedated currently offers access to the following four settings:\n\n•   The system time\n\n•   The system timezone\n\n•   A boolean controlling whether the system RTC is in local or UTC timezone\n\n•   Whether the time synchronization service is enabled/started or disabled/stopped, see next\nsection.\n\nSee org.freedesktop.timedate1(5) and org.freedesktop.LogControl1(5) for information about the\nD-Bus API.\n",
            "subsections": []
        },
        "LIST OF NETWORK TIME SYNCHRONIZATION SERVICES": {
            "content": "systemd-timesyncd will look for files with a \".list\" extension in ntp-units.d/ directories.\nEach file is parsed as a list of unit names, one per line. Empty lines and lines with\ncomments (\"#\") are ignored. Files are read from /usr/lib/systemd/ntp-units.d/ and the\ncorresponding directories under /etc/, /run/, /usr/local/lib/. Files in /etc/ override files\nwith the same name in /run/, /usr/local/lib/, and /lib/. Files in /run/ override files with\nthe same name under /usr/. Packages should install their configuration files in /usr/lib/\n(distribution packages) or /usr/local/lib/ (local installs).\n",
            "subsections": [
                {
                    "name": "Example 1. ntp-units.d/ entry for systemd-timesyncd",
                    "content": "# /usr/lib/systemd/ntp-units.d/80-systemd-timesync.list\nsystemd-timesyncd.service\n\nIf the environment variable $SYSTEMDTIMEDATEDNTPSERVICES is set, systemd-timesyncd will\nparse the contents of that variable as a colon-separated list of unit names. When set, this\nvariable overrides the file-based list described above.\n"
                },
                {
                    "name": "Example 2. An override that specifies that chronyd should be used if available",
                    "content": "SYSTEMDTIMEDATEDNTPSERVICES=chronyd.service:systemd-timesyncd.service\n"
                }
            ]
        },
        "SEE ALSO": {
            "content": "systemd(1), timedatectl(1), localtime(5), hwclock(8), systemd-timesyncd(8)\n\n\n\nsystemd 249                                                             SYSTEMD-TIMEDATED.SERVICE(8)",
            "subsections": []
        }
    },
    "summary": "systemd-timedated.service, systemd-timedated - Time and date bus mechanism",
    "flags": [],
    "examples": [],
    "see_also": [
        {
            "name": "systemd",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/systemd/1/json"
        },
        {
            "name": "timedatectl",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/timedatectl/1/json"
        },
        {
            "name": "localtime",
            "section": "5",
            "url": "https://www.chedong.com/phpMan.php/man/localtime/5/json"
        },
        {
            "name": "hwclock",
            "section": "8",
            "url": "https://www.chedong.com/phpMan.php/man/hwclock/8/json"
        },
        {
            "name": "systemd-timesyncd",
            "section": "8",
            "url": "https://www.chedong.com/phpMan.php/man/systemd-timesyncd/8/json"
        },
        {
            "name": "SYSTEMD-TIMEDATED.SERVICE",
            "section": "8",
            "url": "https://www.chedong.com/phpMan.php/man/SYSTEMD-TIMEDATED.SERVICE/8/json"
        }
    ]
}