Question

where is the Synthax error here?

LOAD DATA INFILE 'mysqlout_back.txt' 
INTO TABLE temp (user,category,site,tld,ip,updated,date) 
FIELDS TERMINATED BY '\t' 
LINES TERMINATED BY '\n' ;

Answer 1

If you only want to load the data in specific columns, the go to the end:

LOAD DATA INFILE 'mysqlout_back.txt' 
INTO TABLE temp FIELDS TERMINATED BY '\t' LINES TERMINATED BY '\n' 
(user,category,site,tld,ip,updated,date) ;

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EDIT, regarding the file location in your comments:

The server uses the following rules to locate the file:

• If the file name is an absolute path name, the server uses it as given.
• If the file name is a relative path name with one or more leading components, the server searches for the file relative to the server’s
  data directory.
• If a file name with no leading components is given, the server looks for the file in the database directory of the default database.

See the MySQL ref