MySQL5.7安装

1.yum安装，先要搞到源

wget http://repo.mysql.com/mysql57-community-release-el7-9.noarch.rpm

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

yum check-update

yum update

yum install mysql mysql-server

*********************接下来是漫长的等待。如果中途关机，或者下载挂了，请执行卸载步骤后，再来一次。完成后记住要给root上密码***********

systemctl start mysqld

grep 'temporary password' /var/log/mysqld.log

mysql -u root

mysql> update mysql.user set authentication_string=password('admin') where user='root' and Host ='localhost';

mysql> flush privileges;

mysql> quit;

systemctl start mysqld

mysql -u root -p

use mysql;

grant all privileges on *.* to root@'%' identified by "admin";

grant all privileges on *.* to piwik@'%' identified by "ph20190420";

FLUSH PRIVILEGES;

create user user@'%' identified by 'admin'

grep 'temporary password' /var/log/mysqld.log

1.root登陆mysql

mysql> set global validate_password_policy=0;

mysql> set global validate_password_mixed_case_count=0;

mysql> set global validate_password_number_count=3;

mysql> set global validate_password_special_char_count=0;

mysql> set global validate_password_length=3;

alter user root@localhost identified by 'admin';

systemctl start mysqld

systemctl stop mysqld

service mysqld restart

用VI打开/etc/my.cnf,增加下面一行,这句话是把上传文件大小改到64M：

max_allowed_packet = 64M piwik建议

查看当前大小

show variables like '%max_allowed_packet%';

至此，安装过程结束，以上为亲自实操，或许由于环境问题，好多异常情况没有遇见，希望大家一起多多交流，共同成长，不足之处请多多批评