linux 安装mysql

本文主要是基于redhat7安装mysql实践

1 先检查是否已经安装了Mysql,如果有先删除

   rpm -qa | grep mysql；rpm -e --nodeps mysql

2 下载安装

   wget wget https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm

   rpm -ivh mysql57-community-release-el7-9.noarch.rpm

   yum install -y mysql-server

   初始化：mysqld --initialize

   默认密码：sudo grep 'temporary password' /var/log/mysqld.log

   chmown -R mysql:mysql  /var/lib/mysql

3 启动服务

   sudo systemctl start mysqld

4 修改默认密码

    mysql -u root -p (回车输出默认密码)

    SET PASSWORD FOR '用户名'@'主机' = PASSWORD('密码');