Centos7.0下MySQL的安装

1.下载mysql的repo源

$ wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

2.安装mysql-community-release-el7-5.noarch.rpm包

$ sudo rpm -ivh mysql-community-release-el7-5.noarch.rpm

安装这个包后，会获得两个mysql的yum repo源：/etc/yum.repos.d/mysql-community.repo，/etc/yum.repos.d/mysql-community-source.repo。

3.安装mysql

$ sudo yum install mysql-server

根据提示安装就可以了,不过安装完成后没有密码,需要重置密码

4.重置mysql密码

$ mysql -u root

登录时有可能报这样的错：ERROR 2002 (HY000): Can‘t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock‘ (2)，原因是/var/lib/mysql的访问权限问题。下面的命令把/var/lib/mysql的拥有者改为当前用户：

$ sudo chown -R root:root /var/lib/mysql

重启mysql服务

$ service mysqld restart

接下来登录重置密码：

$ mysql -u root  //直接回车进入mysql控制台
mysql > use mysql;
mysql > update user set password=password('123456') where user='root';
mysql > FLUSH PRIVILEGES;

如果mysql -u root遇到/var/lib/mysql/mysql.sock错误的时候

ln -s /tmp/mysql.sock /var/lib/mysql/mysql.sock 

远程使用workbench登录MySQL

mysql -u root -p #登录MySQL
use mysql;        #库
select host,user,password from user; #表中存放的是有访问权限的用户和ip
grant all privileges on *.* to 'root'@'你的IP' identified by 'root' with grant option; # 添加用户
flush privileges;
set password for 'root'@'你的IP'=password('你的密码'); # 更改密码