Wouter,
Thursday, July 11, 2002, 2:23:55 PM, you wrote:

WvV> * The mysql index and data files, can they be exchanged from a Windows
WvV> Platform to Linux? Need they be prepared in some way maybe?

In general you can just copy files and then check permissions. But
usage of mysqldump is more recommended. 

WvV> And how are the
WvV> issues when just raw copying the files from one version to another (i.e.
WvV> from version 3.23 to 4.x)?

You can use your 3.23 databases on 4.0, too
    http://www.mysql.com/doc/U/p/Upgrading-from-3.23.html

Up to me, I always make database backup.

WvV> * something very different; when you are connected to mysql, is there some
WvV> thing you can enter to change the user? Like the `su` command in linux?

If you connected with mysql command-line client program - no. In C API
take a look at function mysql_change_user(). This function presents
also in PHP 3 ...






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