ERROR 13 (HY000): Can't get stat of '/Users/wuhongsheng/Desktop/key.txt' (Errcode: 13)

mysql> load data infile '/Users/wuhongsheng/Desktop/key.txt' into table kw;
ERROR 13 (HY000): Can't get stat of '/Users/wuhongsheng/Desktop/key.txt' (Errcode: 13)
mysql> Bye
# mv /Users/wuhongsheng/Desktop/key.txt /
# mysql -uroot
mysql> load data infile '/key.txt' into table kw lines terminated by '\r';
Query OK, 37614 rows affected (2.92 sec)
Records: 37614  Deleted: 0  Skipped: 0  Warnings: 0