apt-get --purge remove mysql-server-4.1
Reading Package Lists... Done
Building Dependency Tree... Done
The following packages will be REMOVED:
  mysql-server-4.1*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
Need to get 0B of archives.
After unpacking 30.8MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 26341 files and directories currently installed.)
Removing mysql-server-4.1 ...
Stopping MySQL database server: mysqld...failed.
/usr/bin/mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'debian-sys-maint'@'localhost' (using password: YES)'
Killing MySQL database server by signal: mysqld.
Purging configuration files for mysql-server-4.1 ...