Final answer:
To restore a MySQL database from a .dump file, use the command 'mysql -u username -p database_name < db_backup.dump', replacing 'username' and 'database_name' accordingly. The '<' symbol is used to redirect the dump file contents to the MySQL command line client.
Step-by-step explanation:
To restore a MySQL database from a .dump file, you generally use the following command syntax:
mysql -u username -p database_name < db_backup.dump
The correct command will prompt you for a password and then restore the database from the specified dump file. The username is your MySQL username, and you replace database_name with the name of the database you wish to restore. Note that the '<' symbol is used to redirect the contents of the db_backup.dump file into the MySQL command line client. On the other hand, the '>' symbol would redirect output to a file, which is not what we want in this case of restoring a database.