Crontab no backup was emptied, how to back up the contents of crontab

Today over the super depressed, colleagues said crontab inside was emptied.

Crontab-l

A look, sure enough.

Did not do any backup, that depressed AH.

The crontab actions after the RAC migration are all done again.

It is estimated that someone accidentally crontab-r the crontab task out of the light.

You can only add tasks manually after that. Then write a shell to back up the crontab every day.

The code for CRONTAB_BAK.SH is as follows:

. /home/enrnd/.bash_profile

Crontab-l >/home/enrnd/crontab_bak/crontab_bak ' date ' +%y%m%d ' txt

Then add a task to the crontab crontab-e

* * */home/enrnd/crontab_bak/crontab_bak.sh