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Crontab first value

Discussion in 'System Administration' started by pamamolf, Nov 9, 2014.

  1. pamamolf

    pamamolf Premium Member Premium Member

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    Hi

    On crontab i know that the first value (*) is minutes and it can be set from 0-59

    But i don't know what it does if used as:


    1) */1
    2) /1

    Can you please let me know what it will do in case 1 and what in case 2 ?

    Thank you !
     
  2. rdan

    rdan Well-Known Member

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  3. pamamolf

    pamamolf Premium Member Premium Member

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    Thanks for the link RoldanLT :)

    But i just want to know for those two scenarios only :)
     
  4. eva2000

    eva2000 Administrator Staff Member

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    read crontab(5): tables for driving cron - Linux man page and CronChecker

    quick google 35.1.1. Configuring Cron Tasks

     
  5. pamamolf

    pamamolf Premium Member Premium Member

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    Thanks George so if i add in the first value in minutes this:

    */1

    It will run every minute or every fist minute of the hour?
     
  6. eva2000

    eva2000 Administrator Staff Member

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    * = */1 both the same for minutes
     
  7. pamamolf

    pamamolf Premium Member Premium Member

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    yes ok both are the same but does this run every minute?
     
  8. eva2000

    eva2000 Administrator Staff Member

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    read the linked manual/info as to what * means ;)
     
  9. pamamolf

    pamamolf Premium Member Premium Member

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    Ok got it thanks :)