Import / Export a database with mysql from terminal
Import:
- Import a single DB
 
$ mysql -u [username] -p [my_db_name] < [my_all_db_filename].sql
- Import all DBs
 
$ mysql -u [username] -p < [my_all_db_filename].sql
Export:
- Export a single database
 
$ mysqldump -u [username] -p [my_db_name] > [my_db_filename].sql
- Export multiple databases
 
$ mysqldump -u [username] -p --databases [my_db_name_1] [my_db_name_2] > [my_db_filename].sql
- Export all databases
 
$ mysqldump -u [username] -p --all-databases > [my_db_filename].sql