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How to reset time in Ubuntu after replacing CMOS battery?

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How to reset time in Ubuntu after replacing CMOS battery?

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TL;DR BIOS Setup, not Operating System

In most systems there is a user-accessible setup page that is part of the BIOS. This is accessed before starting Linux, Windows or any other operating system. The process to get to the setup page varies by manufacturer. Typically it is an F-key (F1, F2, F10, F11, F12 - but could be any) or Delete or some other key pressed during the very beginning of the startup process. On some systems there will be a display showing what key to press. If not, check the manufacturer's web site for information about your particular model.

Once you are in the BIOS setup page it is usually fairly simple to set the date/time, save the changes and restart the computer. Linux (and just about any other operating system since MS/PC-DOS 3.0) will read the date/time automatically.

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OS can do it too (1 comment)

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