mysql> load data infile '/root/aaa' into table test fields terminated by ',' lines terminated by '\n';
mysql> ERROR 13 (HY000): Can't get stat of '/root/aaa' (Errcode: 13)
开始还以为是/root/aaa文件权限或者是mysql的root用户权限的问题，后来想不对呀，mysql的root用户是超级用户，肯定有权限的，那问题就出在/root/aaa文件的权限上，后来把/root/aaa的权限改成777，执行操作后还是不行。
呵呵，原来是aaa文件所在的文件目录权限的问题，这个好办，换到/tmp/aaa，执行上述操作看看：
mysql> load data infile '/tmp/aaa' into table users_groups fields terminated by ',' lines terminated by '\n';
Query OK, 14 rows affected (0.01 sec)
Records: 14 Deleted: 0 Skipped: 0 Warnings: 0
ok，成功了！
之所以要用/tmp目录的原因是mysql默认使用了/tmp作为临时读写目录。
mysql> show variables like '%tmpdir%';
+-------------------+-------+
| Variable_name | Value |
+-------------------+-------+
| slave_load_tmpdir | /tmp |
| tmpdir | /tmp |
+-------------------+-------+
2 rows in set (0.00 sec)