How do I restore a dump file from mysqldump?

When we make a dump file with mysqldump, what it contains is a big SQL script for recreating the databse contents. So we restore it by using starting up MySQL’s command-line client:

mysql -uroot -p 

(where root is our admin user name for MySQL), and once connected to the database we need commands to create the database and read the file in to it:

create database new_db;
use new_db;
\. dumpfile.sql

Details will vary according to which options were used when creating the dump file.