centos7安装mysql

最近看到一篇写安装mysql的blog，感觉很好，做了一个自动化安装脚本，方便以后的安装。这个脚本有个缺陷就是：必须在执行完成后，必须自己敲一下回车。然后将完成了blog所说的安装mysql和相关配置内容。PS.将root用户的密码，设置为了root。

#!/bin/bash
#install mysql.
echo y | yum install mysql
if [  $? -ne  0 ];then
echo "yum install mysql failed"
exit 1
fi


#download mysql-server
wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
if [ $? -ne 0 ];then
    echo "wget is not installed"
    yum -y install wget
    wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
    if [ $? -ne 0 ];then
      echo "download mysql-server failed."
      exit 1
    fi
fi




#install mysql-server
rpm -ivh mysql-community-release-el7-5.noarch.rpm
if [ $? -ne 0 ];then
    echo "rpm -ivh mysql-community-release-el7-5.noarch.rpm failed"
    exit 1
fi
#install mysql-community-server
yum install -y mysql-community-server
if [ $? -ne 0 ];then
    echo "rpm -ivh mysql-community-server failed"
    exit 1
fi


#install mysql-devel
yum -y install mysql-devel
if [ $? -ne 0 ];then
    echo "yum install mysql-devel failed"
    exit 1
fi

#set character-set in /etc/my.cnf
if [ ! -f "/etc/my.cnf" ];then
    echo "/etc/my.cnf doesn't exists. set character-set failed."
    exit 1
fi
echo "[mysql]">> /etc/my.cnf
echo "default-character-set =utf8">> /etc/my.cnf


#restart mysql
service mysqld restart
if [ $? -ne 0 ];then
    echo "service mysqld restart failed."
    exit 1
fi


# execute sql modify password to root  
#grant all table permission to root user in any IP.

echo -e "\n" | mysql -u root -p -e "  
USE mysql;
grant all privileges on *.* to root@'%'identified by 'root';
UPDATE user SET Password = password ('root') WHERE User = 'root' ; 
flush privileges;
quit"

参考地址：
http://blog.csdn.net/qinglu000/article/details/43734471
https://www.cnblogs.com/starof/p/4680083.html

mysql下编码是一个比较棘手的问题。这里小结一下。
http://blog.csdn.net/guchuanhang/article/details/78612536