CentOS7位安装MySql教程
1.先检查系统是否装有mysql
rpm -qa | grep mysql
2.下载mysql的repo源
wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
如果报错: -bash: wget: 未找到命令
安装插件 yum -y install wget
3.安装 mysql-community-release-el7-5.noarch.rpm包
sudo rpm -ivh mysql-community-release-el7-5.noarch.rpm
4.安装MySQL
sudo yum install mysql-server
5.重置MySQL密码
mysql -u root
如果报错：
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
原因：原因是/var/lib/mysql的访问权限问题。
chown root /var/lib/mysql/
重启MySQL服务
service mysqld restart
接着登陆设置密码
mysql -u root
use mysql;
update user set password=password('123456') where user='root';
exit;
6.重启MySQL服务
service mysqld restart
接着设置Root账户远程连接密码，账户和密码都是 root
mysql -u root -p
GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY "root";
重启服务器
service mysqld restart
7.使用外网工具连接MySQL
连接mysql的用户名和密码都是 root
关闭防火墙
systemctl stop firewalld.service