LOAD DATA INFILE does not work - mysql

Question

I am running MySQL on my Ubuntu machine. I checked /etc/mysql/my.cnf file, it shows my database temporary directory:
...
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
...
As it shows, my MySQL server temporary directory is /tmp .
I have a students.dat file, the content of this file is like following:
...
30 kate name
31 John name
32 Bill name
33 Job name
...
I copied the above students.dat file to /tmp directory. Then, I run the following command to load the data from students.dat file to the students table in my database:
LOAD DATA INFILE '/tmp/students.dat'
INTO TABLE school_db.students
FIELDS TERMINATED BY '\t'
LINES TERMINATED BY '\n'
(student_id, name, attribute)
But I got the error message in MySQL console:
ERROR 29 (HY000): File '/tmp/students.dat' not found (Errcode: 13)
Why mysql can not find the students.dat file though the file is under mysql temporary directory?
P.S.
The students table is like following (there are already 4 records in the table before run the LOAD DATA INFILE... query):
mysql> describe students;
+-------------------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------------+--------------+------+-----+---------+-------+
| student_id | int(11) | YES | | NULL | |
| name | varchar(255) | YES | MUL | NULL | |
| attribute | varchar(12) | YES | MUL | NULL | |
| teacher_id | int(11) | YES | | NULL | |
+-------------------+--------------+------+-----+---------+-------+
4 rows in set (0.00 sec)

Answer 1

Have a look at the sixth post from file not found error. It seems if you specify LOAD DATA LOCAL INFILE should work (They added the LOCAL keyword)

Answer 2

ERROR 29 (HY000): File '/tmp/file_name' not found (Errcode: 13)
This error occurs mainly when we try to load data file from any location to any table in mysql database.
Just change the owner of a file.
1) Check permissions of the file with this command:
ls -lhrt <filename>
2) Then change ownership:
chown mysql.mysql <filename>
3) Now try LOAD DATA INFILE command. It will work.