Differences between `/etc/crontab`, files under `/etc/cron.d/` and `/var/spool/cron/crontabs/root`?

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What is the difference between the purposes of



  • /etc/crontab

  • files under /etc/cron.d/

  • /var/spool/cron/crontabs/root

If you want to add a cron job, into which file would you add it?



manpage of cron(8) Says




/etc/cron.d/: directory that contains system cronjobs stored for
different users
.




What does "stored for different users" mean?
It looks confusing with files under /var/spool/cron/crontabs/.



Thanks.










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    up vote
    0
    down vote

    favorite












    What is the difference between the purposes of



    • /etc/crontab

    • files under /etc/cron.d/

    • /var/spool/cron/crontabs/root

    If you want to add a cron job, into which file would you add it?



    manpage of cron(8) Says




    /etc/cron.d/: directory that contains system cronjobs stored for
    different users
    .




    What does "stored for different users" mean?
    It looks confusing with files under /var/spool/cron/crontabs/.



    Thanks.










    share|improve this question























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      What is the difference between the purposes of



      • /etc/crontab

      • files under /etc/cron.d/

      • /var/spool/cron/crontabs/root

      If you want to add a cron job, into which file would you add it?



      manpage of cron(8) Says




      /etc/cron.d/: directory that contains system cronjobs stored for
      different users
      .




      What does "stored for different users" mean?
      It looks confusing with files under /var/spool/cron/crontabs/.



      Thanks.










      share|improve this question













      What is the difference between the purposes of



      • /etc/crontab

      • files under /etc/cron.d/

      • /var/spool/cron/crontabs/root

      If you want to add a cron job, into which file would you add it?



      manpage of cron(8) Says




      /etc/cron.d/: directory that contains system cronjobs stored for
      different users
      .




      What does "stored for different users" mean?
      It looks confusing with files under /var/spool/cron/crontabs/.



      Thanks.







      cron






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      share|improve this question










      asked 11 mins ago









      Tim

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