[GTALUG] TIL: rtcwake / wakealarm

[Stewart C. Russell]

This may be old news to many of you, but today I learned you can have
the computer's real time clock boot your machine at a specific time. The
more proper way seems to be to use the 'rtcwake' command, but you can
also do it by writing the timestamp of the startup time to
/sys/class/rtc/rtc0/wakealarm

Some more details of the /sys method -
https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=309093&p=1849326&sid=ca7a14f7d160f929378be4691b1aed9e#p1849291

cheers,

 Stewart

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