[root@vm10100030 ~]# rpm -e mysql-5.0.77-4.el5_4.2.x86_64 --nodeps
[root@vm10100030 ~]# rpm -e mysql-5.0.77-4.el5_4.2.i386 --nodeps
mysql> use mysql;
mysql> update user set password=PASSWORD("NEWPASSWORD") where User='vivek';
mysql> flush privileges;
mysql> quit
mac 下 安装 mysql5.5 tar文件
http://dev.mysql.com/doc/refman/5.5/en/binary-installation.html
解压
scripts/mysql_install_db --user=mysql
shell> cp support-files/my-medium.cnf /etc/my.cnf
shell> bin/mysqld_safe --user=mysql &
# Next command is optional
cp support-files/mysql.server /etc/init.d/mysql.server
cp bin/mysql /user/sbin/.
设置密码 删掉旧用户即可