首先确定一下自己的DNS  vi /etc/resolv.conf    我一般为114.114.114.114

#-----------------------------CentOS 6.x版本升级Mysql ------------------

#! /bin/sh

#1.关闭selinux

cp -rp /etc/selinux/config /etc/selinux/config.bak

setenforce 0

sed -i '7s/enforcing/disabled/' /etc/selinux/config

#2.显示selinux的状态 Permissive为关闭

getenforce

#3.判断系统的版本

if [ "$(uname -i)" = i386 ]; then

# 如果服务器是32位，那么运行如下命令

echo "开始下载第三方remi库 i386"

wget http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm

wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm

rpm -Uvh remi-release-6*.rpm epel-release-6*.rpm

else

## 如果是64位的 那么运行以下命令

echo "下载第三方remi库 X64"

wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm

rpm -Uvh remi-release-6*.rpm epel-release-6*.rpm

fi

#4.修改remi.repo的配置文件 如果只想升级到php5.4.x，那么就把[remi]部分的enabled改为1

#如果想升级到php5.5.x，那么就把[remi]和[remi-php55]部分的enabled都改为1

cp -rp /etc/yum.repos.d/remi.repo /etc/yum.repos.d/remi.repo.bak

sed -i '9s/enabled=0/enabled=1/' /etc/yum.repos.d/remi.repo

sed -i '18s/enabled=0/enabled=1/' /etc/yum.repos.d/remi.repo

sed -i '7s/^#//' /etc/yum.repos.d/remi.repo

sed -i '8s/^/#&/' /etc/yum.repos.d/remi.repo

sed -i '15s/^#//' /etc/yum.repos.d/remi.repo

sed -i '16s/^/#&/' /etc/yum.repos.d/remi.repo

#修改下面epel.repo的配置文件信息 不然会报错

cp -rp /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.bak

sed -i '3s/^#//' /etc/yum.repos.d/epel.repo

sed -i '12s/^#//' /etc/yum.repos.d/epel.repo

sed -i '21s/^#//' /etc/yum.repos.d/epel.repo

sed -i '4s/^/#&/' /etc/yum.repos.d/epel.repo

sed -i '13s/^/#&/' /etc/yum.repos.d/epel.repo

sed -i '22s/^/#&/' /etc/yum.repos.d/epel.repo

#5.查看系统是不是安装了mysql 卸载之前的mysql版本

yum list mysql

yum remove mysql mysql-server -y

#6. 安装最新的mysql

echo "正在安装新版本的Mysql Please Wait"

yum --enablerepo=remi install mysql mysql-server --skip-broken -y

#7.修改mysql的配置信息

sed -i '3a default-character-set = utf8' /etc/my.cnf

#8. 开启防火墙3306端口

iptables -I INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT

service iptables save

#9.重启Mysql

chkconfig --add mysqld

service mysqld restart