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A New Chapter for MagicMirror: The Community Takes the Lead
Read the statement by Michael Teeuw here.

Crontab to Restart Magic Mirror does not work

Scheduled Pinned Locked Moved Bug Hunt
11 Posts 3 Posters 2.4k Views 3 Watching
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  • S Offline
    sdetweil @Desert Rat
    last edited by sdetweil Nov 27, 2021, 6:36 PM Nov 27, 2021, 6:35 PM

    @desert-rat what is in the pm2 log??

    pm2 logs --lines=50

    what user is the cron entry running as?
    typically root…

    but the pm2 entry is setup for pi probably

    Sam

    How to add modules

    learning how to use browser developers window for css changes

    1 Reply Last reply Reply Quote 0
    • E Offline
      evroom @Desert Rat
      last edited by Nov 27, 2021, 7:11 PM

      @desert-rat

      I would try pm2 iso PM2.
      And even would advise to use the full path, that can be determined using:
      which pm2

      With Debian it would be /usr/local/bin/pm2

      And you can check this log if cron did anything at all:
      /var/log/syslog

      Or edit /etc/rsyslog.conf and remove comment on the line with cron (around line 63)
      Then the dedicated cron log will be in /var/log/cron.log.
      After editing, restart with „sudo systemctl restart rsyslog“.

      Good luck,

      E.J.

      MagicMirror version: 2.30.0
      Raspberry Pi 4 Model B Rev 1.5 (8 GB RAM)
      Raspbian GNU/Linux 12 (bookworm)

      Test environment:
      MagicMirror version: v2.30.0
      Raspberry Pi 3 Model B Plus Rev 1.3 (1 GB RAM)
      Raspbian GNU/Linux 12 (bookworm)

      S 1 Reply Last reply Nov 27, 2021, 7:12 PM Reply Quote 0
      • S Offline
        sdetweil @evroom
        last edited by sdetweil Nov 27, 2021, 7:13 PM Nov 27, 2021, 7:12 PM

        @evroom good catch on the uppercase pm2…

        @Desert-Rat
        everything in Linux is case sensitive

        Sam

        How to add modules

        learning how to use browser developers window for css changes

        D 1 Reply Last reply Nov 27, 2021, 9:24 PM Reply Quote 0
        • D Offline
          Desert Rat @sdetweil
          last edited by Nov 27, 2021, 9:24 PM

          @sdetweil
          Thanks for the quick reply. I changed the crontab. I actually changed it to PM2 START MagicMirror.

          The process I used was to , via the terminal, pm2 stop MagicMirror. This worked and MagicMirror was stopped sucessfully.
          Crontab was updated as above PM2 START MagicMirror.
          It did not start.

          Here are the entries from the log file

          Nov 27 13:44:01 raspberrypi CRON[3620]: (pi) CMD (SUDO PM2 START MagicMirror)
          Nov 27 13:44:01 raspberrypi CRON[3618]: (CRON) info (No MTA installed, discarding output)
          Nov 27 13:55:01 raspberrypi CRON[3661]: (root) CMD (sudo pm2 restart MagicMirror)
          Nov 27 13:55:04 raspberrypi CRON[3659]: (CRON) info (No MTA installed, discarding output)
          Nov 27 14:17:01 raspberrypi CRON[3772]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)

          S E 2 Replies Last reply Nov 27, 2021, 10:01 PM Reply Quote 0
          • S Offline
            sdetweil @Desert Rat
            last edited by Nov 27, 2021, 10:01 PM

            @desert-rat PM2 is not the command

            pm2 is the command and start is the parm

            all lower case

            Sam

            How to add modules

            learning how to use browser developers window for css changes

            1 Reply Last reply Reply Quote 0
            • E Offline
              evroom @Desert Rat
              last edited by Nov 27, 2021, 10:08 PM

              @desert-rat

              Could you please show the crontab ?

              $ crontab -l
              

              To get rid of this:

              (CRON) info (No MTA installed, discarding output)
              

              you have to add >/dev/null 2>&1

              Try:

              44 * * * * /usr/local/bin/pm2 start MagicMirror >/dev/null 2>&1
              

              MagicMirror version: 2.30.0
              Raspberry Pi 4 Model B Rev 1.5 (8 GB RAM)
              Raspbian GNU/Linux 12 (bookworm)

              Test environment:
              MagicMirror version: v2.30.0
              Raspberry Pi 3 Model B Plus Rev 1.3 (1 GB RAM)
              Raspbian GNU/Linux 12 (bookworm)

              1 Reply Last reply Reply Quote 0
              • D Offline
                Desert Rat
                last edited by Nov 29, 2021, 11:21 PM

                Problem resolved! Outstanding.

                My thanks to all who responded.

                My mission now is to research the provided solution and try to understand why it worked. Clearly the devil is in the details.

                Thanks again to all of you

                S 1 Reply Last reply Nov 29, 2021, 11:26 PM Reply Quote 0
                • S Offline
                  sdetweil @Desert Rat
                  last edited by Nov 29, 2021, 11:26 PM

                  @desert-rat said in Crontab to Restart Magic Mirror does not work:

                  to understand why it worked.

                  your crontab entry

                  44 * * * * PM2 restart MagicMirror
                  

                  the working crontab entry

                  44 * * * * /usr/local/bin/pm2 start MagicMirror >/dev/null 2>&1
                  

                  could be restart as well…

                  simple, two things

                  cron runs as root, BUT certain folders are not in the path
                  so you need to specify the path to the command

                   /usr/local/bin/
                  

                  second the command is pm2, you tried PM2
                  in linux EVERYTHING is case sensitive

                  so yours is command not found, cause there is no command named PM2

                  Sam

                  How to add modules

                  learning how to use browser developers window for css changes

                  D 1 Reply Last reply Dec 14, 2021, 3:55 PM Reply Quote 0
                  • D Offline
                    Desert Rat @sdetweil
                    last edited by Dec 14, 2021, 3:55 PM

                    @sdetweil Thanks Sam! I clearly need some education. Do you have a favorite set of training documentation for newbies

                    Desert Rat

                    S 1 Reply Last reply Dec 14, 2021, 6:02 PM Reply Quote 0
                    • S Offline
                      sdetweil @Desert Rat
                      last edited by Dec 14, 2021, 6:02 PM

                      @desert-rat sorry. no idea. my info is gathered over 20+ years

                      there are online linux courses, but I don’t know where they start, or how deep they go, how fast.

                      I have a near photographic memory which is a blessing and a curse…

                      Sam

                      How to add modules

                      learning how to use browser developers window for css changes

                      1 Reply Last reply Reply Quote 0
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