64 lines
2.0 KiB
Markdown
64 lines
2.0 KiB
Markdown
---
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title: How to solve the most common cause of incorrect time in dual boot with windows systems
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description:
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published: true
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date: 2020-03-09T19:26:37.022Z
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tags: documentation, howto
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---
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# How to solve the most common cause of incorrect time in dual boot with windows systems
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If you have an incorrect time issue in Linux on a dual boot with windows system,
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### Check your Linux system:
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```
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$ timedatectl
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Local time: Tue 2018-08-21 13:11:23 CDT
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Universal time: Tue 2018-08-21 18:11:23 UTC
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RTC time: Tue 2018-08-21 18:11:23
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Time zone: US/Central (CDT, -0500)
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System clock synchronized: no
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systemd-timesyncd.service active: yes
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RTC in local TZ: no
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```
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Look at the last line. If it is: `RTC in local TZ: yes` you are set correctly, and the problem must be elsewhere.
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But most likely you will see local TZ is set to no.
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### To fix it run command:
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```
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$ sudo timedatectl set-local-rtc 1 --adjust-system-clock
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```
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> You will be asked for root password, and the command will be executed.
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{.is-warning}
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To verify, type again:
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```
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$ timedatectl
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Local time: Tue 2018-08-21 18:15:28 CDT
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Universal time: Tue 2018-08-21 23:15:28 UTC
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RTC time: Tue 2018-08-21 18:15:28
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Time zone: US/Central (CDT, -0500)
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System clock synchronized: no
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systemd-timesyncd.service active: yes
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RTC in local TZ: yes
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Warning: The system is configured to read the RTC time in the local time zone.
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This mode cannot be fully supported. It will create various problems
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with time zone changes and daylight saving time adjustments. The RTC
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time is never updated, it relies on external facilities to maintain it.
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If at all possible, use RTC in UTC by calling
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'timedatectl set-local-rtc 0'.
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```
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This is correct.
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*(The warning can be ignored)*
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<br>
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### Definitions:
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`RTC` = Real Time Clock also called hardware clock or hwclock
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`TZ` = Time Zone |