After sudo crontab -e (it wrote "/tmp/crontab.XXXX70pN9h" 1L, 19C 1,1 All
Then I saved the file. And to check..? (how? i don't know)
And to check I ps -e | grep cron 29818 ? 00:00:00 cron
So.. but I decided to check again but
sudo cat /etc/cron.hourly cat: /etc/cron.hourly: Is a directory xi@localhost ~ $ sudo ls /etc/cron.hourly
Nothing! i.e. in directory
As I understand first 0 in the hour-position means every hour?