Cron schedule deny to users how to do this lab i am unable to complete this task please help

Cron schedule deny to users @Communiteq @Tej-Singh-Rana

You should do something like this:

echo 'siva' | sudo tee -a /etc/cron.allow
echo 'eric' | sudo tee -a /etc/cron.deny

https://en.wikipedia.org/wiki/Cron
“Cron permissions” section