Here is the quick snippet of how backup and restore MySQL database using mysqldump:

backup:
 # SSH to your machine then type the below given command;
 # mysqldump -u root -p[root_password] [database_name] > dumpfilename.sql

restore:
#SSH to you machine then type the below given commands;
#mysql -u root -p
# mysql -u root -p[root_password] [database_name] < dumpfilename.sql

We recommend linux beginners that, please do not do these steps beacuse of the data security.
 You can open a ticket in our ticketing for the same.