Date: Tue, 8 Sep 2015 15:11:42 +0100 From: Matthew Seaman <matthew@FreeBSD.org> To: freebsd-questions@freebsd.org Subject: Re: How to update the hosts clock as part of cron daily? Message-ID: <55EEEC9E.4090005@FreeBSD.org> In-Reply-To: <55EEE94E.4060906@gmail.com> References: <55EEE94E.4060906@gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --sgPm0AhjMrm4LMBvtTdwb3C4V08oLhbTW Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On 2015/09/08 14:57, Ernie Luzar wrote: > My host motherboard clock is losing about 3 seconds a day. > I have replaced the the motherboard battery but this did not help. > So now I want to run "ntpd -q" or ntpdate once a day as part of > cron:periodic:daily. > I see 480.status-ntpd but no info on what it does or how to active if. >=20 > What is the normal practice to accomplish this? ntpd is a system daemon, and you enable it like any other daemon: Add this to /etc/rc.conf: ntpd_enable=3D"YES" ntpd_sync_on_start=3D"YES" Then, one time only, start ntpd: # service ntpd start With these settings in /etc/rc.conf, ntpd will be started automatically on boot. You can monitor how well ntpd is controlling your clock by running 'ntpq -p' -- where the 'delay' 'offset' and 'jitter' values are measured in milliseconds. ntpd will keep most modern machines with a decent network connection within about 30ms of its time sources (and frequently it will manage within about 5ms) once it has got itself properly synched. Don't bother trying to run ntpdate or similar out of cron. It isn't effective. Just leave ntpd running. Matthew --sgPm0AhjMrm4LMBvtTdwb3C4V08oLhbTW Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQJ8BAEBCgBmBQJV7uykXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQxOUYxNTRFQ0JGMTEyRTUwNTQ0RTNGMzAw MDUxM0YxMEUwQTlFNEU3AAoJEABRPxDgqeTntYIP/A2K4S2FyzVehTRhV6if0Oay lkR0yqQIShRv9hBfZtBJE9wtQZUzPt8uvJ5MQYzqrM+108g2eny92di2xtAFzb6m AL3CEvm5nb8F22Q5qJmuvlz80HME62TYtBZDECRrb2tEDJXnCCUvEgR5bhTUrNu7 gl+ncwupB3nUt40WWderjcjwmKyOFYvRub5aq0twq8mtrCUiyEkueygs0p7Md81G Su+wzmzRZ8bFUMmbZUV29wLioL1t7+13qSE2bjLwHQ3gAx/FW2/mS2KeeZiWqZDe DgzjKlehftpCQ35QjDifoxI68peEzemTbm4hU/lR5BJJhyPc8ZaxynxZdm9RpihR OhfDS/ly2vEDwPB5Vi/q0TuL/Wz6NZI4uzBq645M65G642WtyW7TzPWxYzX+9zCy GEoHD3trFhuAS1clmYiWp5039kqauElDbYXzW6VFhtrsTVy/I+1jBgb0ce1D0BuK 7Or/UeFgO3mrqzLrZ9IVNNV03BnsaQNDpUy+xAXBiksFK3rJV9sptR2A/5O6+tj8 0XQ1h6hHuq65amKRey02ocoeCgPCB5EhktkCuv7wZlTKy3/AI8yBIk6AFNQeGbjM KNul0BxKNa36Of2dQqT56vLoigrS3a+IDlr45kwBrNXx9wxCe19lzbxoLQxvfzth DkQFQXx5rW/h7On59Ay1 =L7Hk -----END PGP SIGNATURE----- --sgPm0AhjMrm4LMBvtTdwb3C4V08oLhbTW--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?55EEEC9E.4090005>