I wrote a simple script in order to log the date and time of every Pi boot into a text file. I placed the script into /etc/rc.local in order to have it execute on boot.

Here's the script:


DATE=$(date +"%m.%d.%y")
TIME=$(date +"%l:%M %P")

$(echo $DATE'\t'$TIME >> $FILEPATH)

I call the script in rc.local using this line:


After every Pi boot, the DATE and TIME variable never change. I end up with a text file looking like:

07.12.16    11:17pm
07.12.16    11:17pm
07.12.16    11:17pm

When I call the script on my own, the DATE and TIME update as expected.

  • Because the clock hasn't yet synchronized with an NTP server, the Pi does not have a real time clock. You could add one or wait for an NTP sync before logging the time. – Ron Beyer Jul 14 '16 at 2:24
  • That makes complete sense. Is there any way to tell when the NTP has been synced, or to ensure that the script is called after that? – R. Llamado Jul 14 '16 at 3:07

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.