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I want to use the cron in the linux redhat 7 in order to run some jobs

but I not want to use the crontab -e , since some users can change my conf

so I did the following example

cd /etc/cron.d
vi test
* * * * echo test >/tmp/test


more test
* * * * echo test >/tmp/test

so I wait one min to see the log - /tmp/test

ut log /tmp/test not created

why ?

what is wrong with my cron ?

ls -ltr
-rw-r--r--  1 root root  29 Aug  1 18:50 test

closed as unclear what you're asking by Rui F Ribeiro, Jesse_b, G-Man, Jeff Schaller, steve Aug 2 '18 at 22:02

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  • 2
    Could you explain what you mean by "some users may change my conf"? – Kusalananda Aug 1 '18 at 19:02
  • @Kusalananda I suspect the account is shared (known to) several different people and using /etc/cron.d isolates his script under root's control – JRFerguson Aug 1 '18 at 19:41
2

Your crontab has only four time and date fields. You need five to be valid.

If you are placing your script in /etc/cron.d you need to add the username that will execute the script as the first field following the standard time and date ones; like:

* * * * * yael echo test > /tmp/test

See man 5 crontab

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