Why is Cron not executing scheduled jobs?

Question

linux

Tell me why cron can not work out the schedule and how to troubleshoot such reasons?

# run-parts
0 * * * * root run-parts /home/user/script

Answer 1

1. When run as root, does it work if run from any folder?
2. If it works, then check for an empty line at the end of crontab
3. sudo crontab -e
each user has his own crontab and if you are editing as a normal user, then privilege escalation will not work.
To run cron as root edit cron as root

Answer 2

# run-parts
0 * * * * root run-parts /home/user/script

This is generally in what crontab?
If this is in the user, then root is superfluous.
If not in the user, then I suspect that it does not find run-parts - specify the full path to run-parts

Answer 3

cat /var/log/syslog | grep 'cron'

Answer 4

1. Is the path to the file correct?
2. Is the permission to execute the file set to chmod +x
3. When run from the console, is the file executed?
In general, there is little information.
What is the file and what are the errors?