I read many about problems with setup magento CRON but I don't find something about this error message with putty ssh connection:
Error during saving of crontab: sh: line 6: crontab: command not found
It is a new Magento 2.2.6 installation.
Where is my mistake?
With Mag 1.9 I had zero problems to activate the CRON. But the Mag 2 seems very complicated.