Export A database Dump Terminal MySql

To export a database use this command in terminal. #mysql#terminal 

mysqldump -u [username] -p [database] > db_backup.sql

If that does not work for you then you may have created a user in cPanel or some other website management application. You may have to use the --no-tablespaces tag. The syntax looks like this

mysqldump --no-tablespaces -h localhost -u database_name -p user_name > bd_backup.sql