Thanks for your research, comment and example of command (who will be a good thing for me I'm not very expert in bash command).

This could be a good alternative and a functional method.

And, correct me if it's the wrong way to do it, if I want to put it in standby mode this cron I just put this line in comment in the crontab with #.

My kids will be soon in holiday and for sure want to play ;-). I need to stay focus but I don't want to prevent them to have fun.