配置mysql主从复制，start slave是报错：ERROR 1201 (HY000): Could not initialize master info structure; more error messages can be found in the MySQL error log

原因：之前做过主从复制

解决办法：
mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> reset slave;
Query OK, 0 rows affected (0.00 sec)

mysql> CHANGE MASTER TO
    -> MASTER_HOST='192.168.122.10',
    -> MASTER_PORT=3306,
    -> MASTER_USER='repl',
    -> MASTER_PASSWORD='repl',
    -> MASTER_LOG_FILE='mysql-bin.000015',
    -> MASTER_LOG_POS=192;
Query OK, 0 rows affected (0.14 sec)

mysql> start slave;
Query OK, 0 rows affected (0.07 sec)