mysqldump - Dump multiple databases from separate mysql accounts to one file

Question

The standard mysqldump command that I use is

mysqldump --opt --databases $dbname --host=$dbhost --user=$dbuser --password=$dbpass | gzip > $filename
         


        

Answer 1

1. For every MySQL server account, dump the databases into separate files

2. For every dump file, execute this command:

   cat dump_user1.sql dump_user2.sql | gzip > super_dump.gz

There is a similar post on Superuser.com website: https://superuser.com/questions/228878/how-can-i-concatenate-two-files-in-unix