Linux下如何实现Mysql定时任务

SELECT @@event_scheduler; 
或
SHOW VARIABLES LIKE 'event%'; 

set GLOBAL event_scheduler = 1; 
或
SET GLOBAL event_scheduler = ON; 

DROP EVENT IF EXISTS JOB_ALARM;
CREATE EVENT JOB_ALARM
 ON SCHEDULE EVERY 10 MINUTE
DO
 BEGIN
  if(date_format(current_time(),'%H')>22 || date_format(current_time(),'%H')<5) THEN
   CALL PRO_ALARM();
  END IF;
END

DROP PROCEDURE IF EXISTS PRO_ALARM; 
CREATE PROCEDURE PRO_ALARM() 
 BEGIN 
  DECLARE userId VARCHAR(32); 
  #这个用于处理游标到达最后一行的情况 
  DECLARE s INT DEFAULT 0; 
  #声明游标cursor_name（cursor_name是个多行结果集） 
  DECLARE cursor_data CURSOR FOR 
   SELECT tmp.USER_ID 
   FROM ( 
       SELECT 
        e.USER_ID, 
        MAX(e.TIME_GMT) TIME_GMT 
       FROM EVENTS e 
       GROUP BY e.USER_ID 
       HAVING MAX(e.TIME_GMT) < UNIX_TIMESTAMP() - 60 * 30 
          AND MAX(e.TIME_GMT) > UNIX_TIMESTAMP() - 60 * 60 * 24) tmp 
    INNER JOIN EVENTS t ON tmp.USER_ID = t.USER_ID 
                   AND tmp.TIME_GMT = t.TIME_GMT 
   WHERE TYPE_ID != '34001'; 
  #设置一个终止标记 
  DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET s = 1; 
  OPEN cursor_data; 
  #获取游标当前指针的记录，读取一行数据并传给变量a,b 
  FETCH cursor_data 
  INTO userId; 
  #开始循环，判断是否游标已经到达了最后作为循环条件 
  WHILE s <> 1 DO 
   INSERT INTO EVENTS_NOTIFICATION VALUES (NULL, SYSDATE(), UNIX_TIMESTAMP(SYSDATE()), 
                          UNIX_TIMESTAMP(SYSDATE()), '00000', userId, '1', '0'); 
   #读取下一行的数据 
   FETCH cursor_data 
   INTO userId; 
  END WHILE; 
  #关闭游标 
  CLOSE cursor_data; 
 END;