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Hash: SHA512 |
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On 05/26/2014 03:44 PM, covici@××××××××××.com wrote: |
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> Hi. I have noticed that when I bootup using systemd, till I run |
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> ntpdate, the times are 4 hours earlier than they should be. Do I |
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> need an hwclock unit somewhere, or some other command to fix? I |
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> don't think the clock is actually wrong, its got to have something |
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> to do with the timezone. |
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> |
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> Thanks in advance for any suggestions. |
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> |
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|
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First, make sure that the system time zone is correct by making sure |
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that /etc/localtime is a symlink to your current timezone (in |
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/usr/share/zoneinfo). |
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|
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If the only operating system you boot on the machine is Linux (or, |
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generally, if you *don't* use Windows): |
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|
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1) Set your BIOS clock to the current time *in UTC*. |
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2) Ensure that the last line of /etc/adjtime reads "UTC" (instead of |
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"LOCAL") |
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|
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If you *do* dual-boot to Windows (and don't want to use the |
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unsupported methods to make Windows aware that the BIOS time is UTC): |
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|
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1) Set your BIOS clock to the current *local* time |
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2) Ensure that the last line of /etc/adjtime reads "LOCAL" (instead of |
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"UTC"). |
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|
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If you dual-boot Windows 7 or earlier and want to use that unsupported |
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method mentioned above: |
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|
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1) Set your BIOS clock to the current time *in UTC*. |
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2) Ensure that the last line of /etc/adjtime reads "UTC" (instead of |
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"LOCAL") |
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3) In Windows, in the registry key |
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"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation" |
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set the value "RealTimeIsUniversal" (a DWORD if you have to create it) |
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to "1". |
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|
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If you use Windows 8, in addition to the above, you have to disable |
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Windows from ever writing the time to the BIOS clock, otherwise on |
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shutdown it will reset the BIOS time to local time. |
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|
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- -- |
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Jonathan Callen |
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