mysql安装运行(centos)

http://repo.mysql.com寻找需要的版本

wget -P /opt/downloads http://repo.mysql.com/mysql57-community-release-el7-11.noarch.rpm
rpm -ivh /opt/downloads/mysql57-community-release-el7-11.noarch.rpm
yum install mysql-server

mysqld位置：/usr/sbin/mysqld
运行文件位置：/usr/bin/mysql
数据文件存放路径：/var/lib/mysql
安装路径/var/lib/mysql
配置文件：/etc/my.cnf
日志文件：/var/log/var/log/mysqld.log
服务启动脚本：/usr/lib/systemd/system/mysqld.service
进程标识文件：/var/run/mysqld/mysqld.pid

修改配置
vim /etc/my.cnf

加入
validate_password=off
允许把密码改简单

service mysqld restart
service mysqld status
cat /var/log/mysqld.log | grep "temporary password" 查看密码
mysql -u root -p
输入密码
SET PASSWORD = PASSWORD('123456');
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
flush privileges;

查看防火墙状态
systemctl status firewalld.service
若要远程访问需：
关闭防火墙
systemctl stop firewalld.service
或穿透3306端口
iptables -I INPUT -p tcp --dport 3306 -j ACCEPT

systemctl enable mysqld.service
systemctl start mysqld.service
systemctl status mysqld.service

修改密码

GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY 'xxxx' WITH GRANT OPTION;

打开远程权限

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'xxxx' WITH GRANT OPTION;

FLUSH PRIVILEGES;