mysql版本兼容问题

mysql 4 连接mysql5时可能出现的问题：

[root@ljj ~]# mysql -ulijunjie -h ljj.cn -paaa
ERROR 1251: Client does not support authentication protocol requested by server; consider upgrading MySQL client
[root@ljj ~]# mysql -V
mysql  Ver 12.22 Distrib 4.0.25, for pc-linux-gnu (i686)
[root@ljj ~]#