rpm -qa | grep mysql
mysqlclient10-3.23.58-4.RHEL4.1
mysql-4.1.20-2.RHEL4.1
mysql-4.1.20-2.RHEL4.1
mysqlclient10-3.23.58-4.RHEL4.1

尝试卸载：

rpm -e mysqlclient10-3.23.58-4.RHEL4.1
error: “mysqlclient10-3.23.58-4.RHEL4.1″ specifies multiple packages

通过man rpm，发现–allmatches应该可以解决这个问题：

–allmatches
Remove all versions of the package which match PACKAGE_NAME. Normally an error is issued if PACKAGE_NAME matches
multiple packages.

rpm -e –allmatches mysqlclient10-3.23.58-4.RHEL4.1
rpm -e –allmatches mysql-4.1.20-2.RHEL4.1
warning: /etc/my.cnf saved as /etc/my.cnf.rpmsave

ok，系统自带的旧版本MySQL卸载完成。