MySQL command line import/export
Export
mysqldump -u username -p database_name > dbname.sql
Import
mysql -p -u username database_name < dbname.sql
Replace username with the database username
Replace database_name with the name of the database
Condition of the above working is, that you are logged into the Linux server (by ssh or console) that runs the MySQL database and that you have the password relevant to the database user.