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    UNIX Scheduling with cron

    Scheduled Pinned Locked Moved IT Discussion
    linuxunixsam linux administrationcroncron jobcrontabbsdsolaris
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    • scottalanmillerS
      scottalanmiller @JaredBusch
      last edited by

      @JaredBusch said in UNIX Scheduling with cron:

      @scottalanmiller said in UNIX Scheduling with cron:

      The fields can be in these forms:

      • Single Number: 5
      • List of Numbers: 0,15,30,45
      • Range of Numbers: 1-5
      • All: *

      From memory here, not bothering to check Google at the moment, but can you not also mix a list and range?

      0,8-17,22
      

      So that would send at midnight, and every hour 8-17 and then 22?

      Yes, I'm pretty sure that that is correct.

      1 Reply Last reply Reply Quote 0
      • tonyshowoffT
        tonyshowoff
        last edited by

        I've been dealing with cron for... 22 years I guess, and it still irritates the hell out of me. Anyway, great work.

        scottalanmillerS 1 Reply Last reply Reply Quote 2
        • coliverC
          coliver @stacksofplates
          last edited by

          @johnhooks said in UNIX Scheduling with cron:

          Just to point out, there are some other strings you can use also.

          @yearly
          @weekly
          @daily
          

          You can also use /

          0-30/5 * * * *
          

          Is every 5 minutes for the first 30 minutes.

          I didn't know about the '/' That's really good to know.

          scottalanmillerS 1 Reply Last reply Reply Quote 1
          • scottalanmillerS
            scottalanmiller @tonyshowoff
            last edited by

            @tonyshowoff said in UNIX Scheduling with cron:

            I've been dealing with cron for... 22 years I guess, and it still irritates the hell out of me. Anyway, great work.

            Thanks.

            1 Reply Last reply Reply Quote 0
            • scottalanmillerS
              scottalanmiller @coliver
              last edited by

              @coliver said in UNIX Scheduling with cron:

              I didn't know about the '/' That's really good to know.

              I tacked it on in the advanced section at the end. This one I've seen used in real life. Never seen anyone use @monthly, for example. I know that it exists, but just have never seen it get used.

              tonyshowoffT 1 Reply Last reply Reply Quote 0
              • tonyshowoffT
                tonyshowoff @scottalanmiller
                last edited by

                @scottalanmiller said in UNIX Scheduling with cron:

                @coliver said in UNIX Scheduling with cron:

                I didn't know about the '/' That's really good to know.

                I tacked it on in the advanced section at the end. This one I've seen used in real life. Never seen anyone use @monthly, for example. I know that it exists, but just have never seen it get used.

                I do, for expiring old user sessions.

                1 Reply Last reply Reply Quote 1
                • travisdh1T
                  travisdh1
                  last edited by

                  I was going to say that it's another handy reference to the time formatting for cron, but I normally just use the man page.

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                  • A
                    Alex Sage
                    last edited by Alex Sage

                    6:03 AM

                    03 6 * * * <command>

                    or

                    3 6 * * * <command>

                    ???

                    JaredBuschJ 1 Reply Last reply Reply Quote 0
                    • JaredBuschJ
                      JaredBusch @Alex Sage
                      last edited by

                      @aaronstuder said in UNIX Scheduling with cron:

                      6:03 AM

                      03 6 * * * <command>

                      or

                      3 6 * * * <command>

                      ???

                      The latter.

                      1 Reply Last reply Reply Quote 1
                      • A
                        Alex Sage
                        last edited by

                        Thanks!

                        1 Reply Last reply Reply Quote 0
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