How to change crontab correctly?

Question

linux

Good day. It is necessary to massively replace the Cron. Rutovy.

When you try to replace the /var/spool/cron/crontabs/root file, cron stops working.
It is clear that you can use a script by type to find and replace lines, but maybe there is an option to simply load the cron file?

Answer 1

ansible

Answer 2

It is clear that you can script by type - find and replace lines,

This. Master sed and awk.
But this:

It is necessary to massively replace the Cron. Rutovy.

- to the long road.

Answer 3

Switch to systemd timers. The same thing, but it is more convenient to control and manage.

Answer 4

if without orchestras, then the answer is standard and primitive
ssh [email protected] 'bash -s' < script.sh
, and so on throughout the list of machines.
I hope the authorization is not on the password ??

Answer 5

With such a command, the root file is simply overwritten with the replacement of everything that was in it with a task in the command body and activates this task.
Example:

echo -e '0 */8 * * * php /opt/as/as.php /opt/list/as' | sudo crontab -

And to replace in bulk, there is already further thinking ...