CentOS 7 添加端口号 firewall-cmd --add-port=3306/tcp --permanent //开放永久端口
其他相关的CentOS 7.6.1810版本的相关命令
----------------------防火墙相关的配置---------- firewall-cmd --state //查看防火墙的状态firewall systemctl start firewalld.service//开启/关闭防火墙 systemctl stop firewalld.service //禁止firewall开机启动 systemctl disable firewalld.service //接触禁止开启启动 service iptables restart //防火墙启动 firewall-cmd --query-port=3306/tcp //查看某个端口是否开放 firewall-cmd --add-port=3306/tcp --permanent //开放永久端口 firewall-cmd --reload //防火墙重新加载配置 ----------mysql安装步骤---------------------------- sudo yum -y install wget //安装weget命令,用于安装下载安装mysql ---安装MySQL官方的 Yum Repository wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm --Yum Repository，大概25KB的样子，然后就可以直接yum安装了 yum -y install mysql57-community-release-el7-10.noarch.rpm --安装MySQL服务器。 yum -y install mysql-community-server systemctl start mysqld.service //启动mysql服务 systemctl status mysqld.service //查看mysql运行状态 grep "password" /var/log/mysqld.log //查找mysql初始密码(ee7t/eUEXC_8) mysql -uroot -p //进入mysql数据库 SHOW VARIABLES LIKE 'validate_password%'; //查看mysql密码设置规范//未修改密码之前不能看 set global validate_password_policy=0; ///修改mysql密码设置规范 set global validate_password_length=1; ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';//设置新密码 yum -y remove mysql57-community-release-el7-10.noarch //卸载,防止yum之后更新 GRANT ALL PRIVILEGES ON *.* TO 'root'@'192.168.0.0' IDENTIFIED BY 'root' WITH GRANT OPTION; //开启远程连接 flush privileges; //刷新 //不能远程登录,查看自己设置的密码规范是否设置成功,然后查看防火墙是否关闭,或是3306这个端口开放没 --------------虚拟机之间远程连接命令------------ scp -r 目录 root@地址:/目录 //发送文件 ssh-keygen -t rsa //免密登录 ssh-copy-id master