1、检查MySQL及相关RPM包，是否安装，如果有安装，则移除（rpm –e 包名、或者rpm –e 包名 –nodeps）
[root@localhost ~]# rpm -qa | grep -i mysql
mysql-libs-5.1.66-2.el6_3.x86_64
[root@localhost ~]# yum -y remove mysql-libs* 或者
[root@localhost ~]#rpm –e mysql-libs-5.1.66-2.el6_3.x86_64 –nodeps
2、下载Linux对应的RPM包，标准功能安装如下两个包即可
MySQL-client-5.5.42-1.el6.x86_64.rpm
MySQL-server-5.5.42-1.el6.x86_64.rpm
3、安装MySQL
[root@localhost rpm]# rpm -ivh MySQL-server-5.6.20-1.linux_glibc2.5.x86_64
[root@localhost rpm]# rpm -ivh MySQL-client-5.6.20-1.linux_glibc2.5.x86_64
4、修改配置文件位置并启动MySQL
[root@localhost rpm]# cp /usr/share/mysql/my-small.cnf /etc/my.cnf
[root@localhost rpm]# service mysql start
5、初始化MySQL密码
[root@localhost rpm]# mysqladmin -u root password ‘secret’
6、允许远程登陆
[root@localhost rpm]# mysql -u root -ppassowd mysql
mysql> select host,user,password from user;
+————————+——+————————————————————+
| host | user | password |
+————————+——+————————————————————+
| localhost | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| localhost.localdomain | root | *1237E2CE819C427B0D8174456DD83C47480D37E8 |
| 127.0.0.1 | root | *1237E2CE819C427B0D8174456DD83C47480D37E8 |
| ::1 | root | *1237E2CE819C427B0D8174456DD83C47480D37E8 |
+————————+——-+———————————————————–+
mysql> update user set password=password(‘123456′) where user=’root’;
mysql> update user set host=’%’ where user=’root’ and host=’localhost’;
mysql> flush privileges;
mysql> exit
注：把host修改为%之后，外网能访问了，本地就不能访问了。想让本地也能访问，在使用mysql连接数据库服务的时候需加上-h hostname，指定的hostname在user表的host列中能找到，user字段同时也有值。
如果远程连接任连接不上，请参考如下链接检查防火墙设置：
7、设置开机自启动
[root@localhost ~]# chkconfig mysql on
[root@localhost ~]# chkconfig –list | grep mysql
mysql 0:off 1:off 2:on 3:on 4:on 5:on 6:off
8、MySQL默认安装路径
| Directory | Contents of Directory |
| /usr/bin | Client programs and scripts |
| /usr/sbin | The mysqld server |
| /var/lib/mysql | Log files, databases |
| /usr/share/info | MySQL manual in Info format |
| /usr/share/man | Unix manual pages |
| /usr/include/mysql | Include (header) files |
| /usr/lib/mysql | Libraries |
| /usr/share/mysql | Miscellaneous support files, including error messages, character set files, sample configuration files, SQL for database installation |
| /usr/share/sql-bench | Benchmarks |