MYSQL ERROR 2049 (HY000): Connection using old (pre-4.1.1) authentication protocol ref used (client option 'secure_auth' enabled)
On the command line, use something like the following, if you have no choice...

mysql -uTheUseerNAme -pThePassword DbName -h HostName --skip-secure-auth


Hope this helps someone, as this was my problem connecting from a Linux