$ yum install crontabs
$ systemctl enable crond
$ systemctl start crond
vim /etc/crontab
写入：30 1 * * * root /home/brainDataBackup/backup.sh
crontab /etc/crontab
backup.sh内容
#! /bin/bash
MYDATE=`date +%y%m%d`
mysqldump -uiom -piom2020 -h221.180.141.26 -P3306 --databases bigdata brain_benefit_status brain_chain_map brain_demo_db brain_dict_db brain_distribution_map brain_emission_management brain_energy_efficiency brain_enterprise_alarm brain_enterprise_diagnosis brain_expert_article brain_expert_database brain_expert_support brain_industry_map brain_massive_economic brain_mould_index brain_oauth2_server_db brain_porter_db brain_talent_center brain_test brain_user_db brain_workflow_db>/home/brainDataBackup/backup$MYDATE.sql
mysqldump -uiom -piom2020 --databases bigdata brain_benefit_status brain_chain_map brain_demo_db brain_dict_db brain_distribution_map brain_emission_management brain_energy_efficiency brain_enterprise_alarm brain_enterprise_diagnosis brain_expert_article brain_expert_database brain_expert_support brain_industry_map brain_massive_economic brain_mould_index brain_oauth2_server_db brain_porter_db brain_talent_center brain_test brain_user_db brain_workflow_db>/home/brainDataBackup/backup$MYDATE.sql
