I have a problem with my Cron on Ubuntu 16.04. I checked that cron service is up and running but scripts that create Mongo DB backups probably is not run.

This is my /etc/crontab file content:

# /etc/crontab: system-wide crontab

# Unlike any other crontab you don't have to run the `crontab'

# command to install the new version when you edit this file

# and files in /etc/cron.d. These files also have username fields,

# that none of the other crontabs do.



SHELL=/bin/sh

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin



# m h dom mon dow user  command

*/10 * * * * root   test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.hourly )

17 *    * * *   root    cd / && run-parts --report /etc/cron.hourly

25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )

47 6    * * 7   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )

52 6    1 * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )

#

and here is my db_backup.sh file content:

#!/bin/sh

DIR=`date +%m%d%y`

DEST=/db_backups/$DIR

mkdir $DEST

mongodump -h localhost:27017 -d dbname -u xxxx -p xxx -o $DEST

When I run in terminal:
sh /etc/cron.hourly/db_backup.sh

Its create Mongo DB backup with dir date name in /db_backups/somedate

Why my script not running every 10 minutes and 1 hour?

As you can see I put script in cron.hourly folder but nothings happen neither 10 minutes or 1 hour.