2020.5.23 centos8 安装mysql 5.7

1.wget dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm --no-check-certificate  获取rpm 包

2. mv mysql-community-release-el6-5.noarch.rpm /home/liujun/  将包移动到某个目录下

3.yum localinstall mysql-community-release-el6-5.noarch.rpm

4. yum repolist all | grep mysql 查看安装的依赖

5. /etc/yum.repos.d/mysql-community.repo 的设置如下，注意最后一栏 [mysql57-community-dmr]

[mysql-connectors-community]
name=MySQL Connectors Community
baseurl=http://repo.mysql.com/yum/mysql-connectors-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

[mysql-tools-community]
name=MySQL Tools Community
baseurl=http://repo.mysql.com/yum/mysql-tools-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

# Enable to use MySQL 5.5
[mysql55-community]
name=MySQL 5.5 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.5-community/el/6/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

# Enable to use MySQL 5.6
[mysql56-community]
name=MySQL 5.6 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.6-community/el/6/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

# Note: MySQL 5.7 is currently in development. For use at your own risk.
# Please read with sub pages: https://dev.mysql.com/doc/relnotes/mysql/5.7/en/
[mysql57-community-dmr]
name=MySQL 5.7 Community Server Development Milestone Release
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/
enabled=1
gpgcheck=0
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

6.sudo yum install mysql-server

修改密码： 

在 /etc/my.cnf 后面加 skip-grant-tables  免密登录

1.systemctl restart mysqld  重启服务

2.mysql -u root -p 输入密码时直接按Enter键登录

3.update mysql.user set authentication_string=password(‘xxx‘) where user=‘root‘ and host=‘localhost‘;  xxx 改为自己密码

4.flush privileges 刷新

5.skip-grant-tables

6.systemctl restart mysqld 再重启

命令：

1. rpm -qa | grep -i mysql 查询mysql 安装的依赖

2.yum install mysql-devel  安装后有mysql 文件夹