mkdir /usr/local/mysqlBackup

/usr/local/mysql/bin/mariabackup --defaults-file=/etc/my.cnf --backup --user=root --password=‘123456‘ --port=3306 --target-dir=/usr/local/mysqlBackup/$(date ‘+%Y-%m-%d‘)_fullbackup

/usr/local/mysql/bin/mariabackup --defaults-file=/etc/my.cnf --backup --databases="test_db base_db_dev.t_app_base" --user=root --password=‘123456‘ --port=3306 --target-dir=/usr/local/mysqlBackup/$(date ‘+%Y-%m-%d‘)_fullbackup

#先将删除原目录下的数据文件
cd /usr/local/db/mysql/data && rm -rf *

#恢复
/usr/local/mysql/bin/mariabackup --defaults-file=/etc/my.cnf --copy-back --datadir=/usr/local/db/mysql/data --target-dir=/usr/local/mysqlBackup/2020-09-15_fullbackup

#给权限
chmod -R 777 /usr/local/db

#重启MariaDB服务
service mysql restart