沧海一粟

首选查看是否安装了linux自带的mysql，如果有可以卸载后再安装。

#rpm -qa|grep -i mysql

卸载mysql

#rpm -ev mysqlclient10-3.23.58-4.RHEL4.1

rpm -ev mysql-4.1.12-3.RHEL4.1

如果出现如下错误：
#rpm -e mysql-4.1.12-3.RHEL4.1
error: Failed dependencies:
        libmysqlclient.so.14 is needed by (installed) cyrus-sasl-sql-2.1.19-5.EL4.i386
        libmysqlclient.so.14 is needed by (installed) dovecot-0.99.11-2.EL4.1.i386
那么，你需要按倒序来先删除dovecot-0.99.11-2.EL4.1.i386，然后是cyrus-sasl-sql-2.1.19-5.EL4.i386，最后，你可以完全删除mysql-devel，其他的类似。

#rpm -e cyrus-sasl-sql-2.1.19-5.EL4.i386
#rpm -e libmysqlclient.so.14
#rpm -ev mysql-4.1.12-3.RHEL4.1

下面开始安装mysql

#tar -zvxf mysql-5.0.40.tar.gz
#id mysql   //查看是否建立mysql用户名和用户组，如果没有，请先建立。
#groupadd mysql
#useradd -g mysql mysql
#cd mysql-5.0.40
#./configure -prefix=/usr/local/mysql -with-charset=gbk -with-extra-charsets=all //默认字符集是GBK，带扩展字符集。
#make
#make install
#cp support-files/my-medium.cnf /etc/my.cnf
#./scripts/mysql_install_db --user=mysql
//初试化表并且规定用mysql用户来访问。初始化表以后就开始给mysql和root用户设定访问权限
#chown -R root /usr/local/mysql
#chown -R mysql /usr/local/mysql/var
#chown -R mysql /usr/local/mysql/var/.
#chown -R mysql /usr/local/mysql/var/
#chown -R mysql /usr/local/mysql/var/mysql
#chown -R mysql /usr/local/mysql/var/mysql/
#chown -R mysql /usr/local/mysql/var/mysql/.
#chgrp -R mysql /usr/local/mysql
# cp support-files/mysql.server /etc/rc.d/init.d/mysqld
# chmod 700 /etc/init.d/mysqld
# chkconfig --add mysqld
# chkconfig --level 345 mysqld on
# service mysqld start
# netstat -atln 查看mysql端口3306是否打开，如果打开说明安装成功

设置mysql 中root密码：/usr/local/mysql/bin/mysqladmin -u root password 'new-password'