Time change due to Windows-Ubuntu dual boot

This happens because Windows thinks the hardware clock tracks local time, while Ubuntu thinks the clock tracks UTC.

If the time is reset in Ubuntu, the time would be wrong in Windows.

A good solution is to set Ubuntu to treat the hardware clock as local time.

For older systems, edit /etc/default/rcS as root and make sure that UTC=no.

For newer systems using systemd (15.04+), you shall run the following command.

timedatectl set-local-rtc 1

Reference

Reference 2

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