mysqldump: Got error: 2049: Connection using old (pre-4.1.1) authentication protocol refused (client option 'secure_auth' enabled)
If you don't use a newer or equal version as 5.7.5 as client, you can add the parameter --skip-secure-auth to mysqldump. But since this is deprecated and not supported in newer version, it's best to migrate away from Pre-4.1 Password Hashing and the mysql_old_password plugin