For this exercise, we will use the mysqldump utility the same as if we were
Syntax:
mysqldump -d -h localhost -u root -pmypassword databasename > dumpfile.sql
The only option that is different than creating an entire backup is the -d switch, which tells mysqldump not to output the data.
Example:
mysqldump -d -h localhost -u root -p2Uad7as9 database01 > dumpfile.sql
For every database, you should set the root or sa passwords to something other than the default, unless you want to get hacked. For mysql, the system administrator user is called root. You will use the mysqladmin utility from a command line to set the new password. Notice that there are two commands to be run.
Syntax:
mysqladmin -u root password “newpassword”
mysqladmin -u root -h host_name password “newpassword”
Example:
mysqladmin -u root password ws8dr8as3
mysqladmin -u root -h localhost password ws8dr8as3
You will also want to restart the database server after running this command
sudo /etc/init.d/mysql restart
There are many reasons you would want to restore a database from a backup file… But you should also test this on a test server just to make sure that your database backups are working correctly. Here’s the syntax:
mysql -h hostname -u username -pthepassword databasename < dumpfile.sql
Here’s an example:
mysql -h localhost -u root -p72aDufi8 db01 < thedumpfile.sql
Backing up your database is a very important system administration task, and should generally be run from a cron job at scheduled intervals. We will use the mysqldump utility included with mysql to dump the contents of the database to a text file that can be easily re-imported.
Syntax:
mysqldump -h localhost -u root -pmypassword databasename > dumpfile.sql
Example:
mysqldump -h localhost -u root -p2Uad7as9 database01 > dumpfile.sql
This will give you a text file containing all the commands required to recreate the database.
