Для генерации dbName.sql.gz
mysqldump -u <YOUR USERNAME> -p<YOUR PASSWORD> <YOUR DBNAME> | gzip > ~/mysqlBackup/dbName_`date +%Y%m%d%H%M`.sql.gz
Для загрузки dbName.sql.gz
zcat ~/mysqlBackup/<.SQL.GZ file> | mysql -u <YOUR USERNAME> -p<YOUR PASSWORD> <DATABASE NAME IN WHICH YOU WANT TO LOAD>