概述
本文实例讲述了centos6.7安装mysql5.5.48的方法。分享给大家供大家参考，具体如下：
RPM安装mysql 5.5.48
下载对应的MySQL安装包rpm文件，可以去MySQL官方网站找到对应版本，一般需要下载3个文件
MySQL-server
MySQL-client
MySQL-devel
复制代码 代码如下:
wget http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-server-5.5.48-1.el6.x86_64.rpm
wget http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-client-5.5.48-1.el6.x86_64.rpm
wget http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-devel-5.5.48-1.el6.x86_64.rpm
rpm -ivh MySQL-server-5.5.48-1.el6.x86_64.rpm
rpm -ivh MySQL-client-5.5.48-1.el6.x86_64.rpm
rpm -ivh MySQL-devel-5.5.48-1.el6.x86_64.rpm
wget http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-client-5.5.48-1.el6.x86_64.rpm
wget http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-devel-5.5.48-1.el6.x86_64.rpm
rpm -ivh MySQL-server-5.5.48-1.el6.x86_64.rpm
rpm -ivh MySQL-client-5.5.48-1.el6.x86_64.rpm
rpm -ivh MySQL-devel-5.5.48-1.el6.x86_64.rpm
安装服务端出错：
复制代码 代码如下:
[root@localhost ~]# rpm -ivh MySQL-server-5.5.48-1.el6.x86_64.rpm
warning: MySQL-server-5.5.48-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ########################################### [100%]
file /usr/share/mysql/charsets/Index.xml from install of MySQL-server-5.5.48-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-5.el6_6.x86_64
file /usr/share/mysql/charsets/armscii8.xml from install of MySQL-server-5.5.48-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-5.el6_6.x86_64
file /usr/share/mysql/charsets/ascii.xml from install of MySQL-server-5.5.48-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-5.el6_6.x86_64
file /usr/share/mysql/charsets/cp1250.xml from install of MySQL-server-5.5.48-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-5.el6_6.x86_64
file /usr/share/mysql/charsets/cp1256.xml from install of MySQL-server-5.5.48-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-5.el6_6.x86_64
warning: MySQL-server-5.5.48-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ########################################### [100%]
file /usr/share/mysql/charsets/Index.xml from install of MySQL-server-5.5.48-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-5.el6_6.x86_64
file /usr/share/mysql/charsets/armscii8.xml from install of MySQL-server-5.5.48-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-5.el6_6.x86_64
file /usr/share/mysql/charsets/ascii.xml from install of MySQL-server-5.5.48-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-5.el6_6.x86_64
file /usr/share/mysql/charsets/cp1250.xml from install of MySQL-server-5.5.48-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-5.el6_6.x86_64
file /usr/share/mysql/charsets/cp1256.xml from install of MySQL-server-5.5.48-1.el6.x86_64 conflicts with file from package mysql-libs-5.1.73-5.el6_6.x86_64
错误原因：包冲突了
centos6.7 basic server 版本 默认安装了mysql5.1，所以先卸载mysql5.1
复制代码 代码如下:
yum -y remove mysql-libs-5.1*
再重新安装即可
复制代码 代码如下:
rpm -ivh MySQL-server-5.5.48-1.el6.x86_64.rpm
启动mysql
复制代码 代码如下:
[root@localhost ~]# service mysql start
Starting MySQL SUCCESS!
Starting MySQL SUCCESS!
CentOS下安装官方RPM包的MySQL后找不到my.cnf解决办法
复制 /usr/share/mysql/my-medium.cnf 文件到/etc目录，
复制代码 代码如下:
cp /usr/share/mysql/my-medium.cnf /etc/my.cnf
局域网内mysql连接慢的解决办法
ping都很快，mysql连接慢，
原因是由于mysql对连接的客户端进行DNS反向解析。
有2种解决办法：
1. 把client的ip写在mysql服务器的/etc/hosts文件里，随便给个名字就可以了。
2. 在 my.cnf 中加入 –skip-name-resolve 。
希望本文所述对大家centos服务器配置有所帮助。
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