【Linux】使用wget命令在线安装Mysql5.7

一、安装MySQL
1）下载rpm安装包
wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
2） 安装mysql源
yum localinstall mysql57-community-release-el7-8.noarch.rpm
3）检查mysql源是否安装成功
yum repolist enabled | grep "mysql.*-community.*"
> mysql-connectors-community/x86_64 MySQL Connectors Community                  3> mysql-tools-community/x86_64      MySQL Tools Community                       4> mysql57-community/x86_64          MySQL 5.7 Community Server                 184)开始安装mysql
yum install mysql-community-serveryum install mysql-community-devel
5）启动mysql
service mysqld start
6）查看mysql启动状态
service mysqld status
7）设置开机启动
systemctl enable mysqldsystemctl daemon-reload
8）获取mysql默认生成的密码
grep 'temporary password' /var/log/mysqld.log
> 2017-07-04T06:06:06.824762Z 1 [Note] A temporary password is generated for root@localhost: h8wob/ou+wpC

注意：密码就是结尾冒号后面那一串

9）进入mysql命令行

mysql -uroot -p
> Enter password:h8wob/ou+wpC

如果成功进入mysql，linux前面的标识就会变成下面这种

> mysql>10）更换密码> mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123IsYourNewPassword!';注意：这里的新密码必须包含数字、小写或大写字母、特殊字符串。这个密码的复杂程度，和validate_password_policy的值有关。至此，mysql安装完成
二、安装中常出现的问题
等待更新。。。