mysql安装

参考链接 https://my.oschina.net/Laily/blog/713022
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查找mariadb版本

rpm -qa | grep -i mariadb-libs
-- 强制卸载 mariadb
rpm -e --nodeps mariadb-libs-5.5.52-1.el7.x86_64

依次安装
[root@centos-linux ~]# rpm -ivh mysql-community-common-5.7.17-1.el7.x86_64.rpm
[root@centos-linux ~]# rpm -ivh mysql-community-libs-5.7.17-1.el7.x86_64.rpm
[root@centos-linux ~]# rpm -ivh mysql-community-client-5.7.17-1.el7.x86_64.rpm
[root@centos-linux ~]# rpm -ivh mysql-community-server-5.7.17-1.el7.x86_64.rpm

##初始化数据
mysqld --initialize --user=mysql
查看临时密钥
# cat /var/log/mysqld.log
E*7P0qaepNzS

#启动mysql
systemctl start mysqld (stop/restart/status)

##设置密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';

##开放外部访问
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'flying' WITH GRANT OPTION;
#刷新权限
FLUSH PRIVILEGES;

-- 开放端口

firewall-cmd --zone=public --add-port=3306/tcp --permanent

重启防火墙

firewall-cmd --reload

命令含义：

--zone #作用域
--add-port=80/tcp #添加端口，格式为：端口/通讯协议
--permanent #永久生效，没有此参数重启后失效

重启防火墙

0.8u*Kb0Vrij
firewall-cmd --reload

##设置密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';

##开放外部访问
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
FLUSH PRIVILEGES;