一、前言

直接“yum -y install mysql”安裝mysql，你會發現，安裝的是MariaDB，并且默認是5.5版本，因此如果我們想控制版本，而需要下面的方法

二、安裝epel倉庫

yum -y install epel-release

三、手動創建mysql的yum源

[root@dabiaoge ~]# cd /etc/yum.repos.d/

[root@dabiaoge yum.repos.d]# vim mysq.repo

[mysql-connectors-community]

name=MySQL Connectors Community

baseurl=http://repo.mysql.com/yum/mysql-connectors-community/el/7/$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/7/$basearch/

enabled=1

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

[mysql57-community]

name=MySQL 5.7 Community Server

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

[mysql-tools-preview]

name=MySQL Tools Preview

baseurl=http://repo.mysql.com/yum/mysql-tools-preview/el/7/$basearch/

enabled=0

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

[mysql-cluster-7.5-community]

name=MySQL Cluster 7.5 Community

baseurl=http://repo.mysql.com/yum/mysql-cluster-7.5-community/el/7/$basearch/

enabled=0

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

[mysql-cluster-7.6-community]

name=MySQL Cluster 7.6 Community

baseurl=http://repo.mysql.com/yum/mysql-cluster-7.6-community/el/7/$basearch/

enabled=0

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

四、安裝mysql

[root@dabiaoge yum.repos.d]# yum -y install mysql-community-server

五、參看版本

[root@dabiaoge yum.repos.d]# mysql -V

mysql Ver 14.14 Distrib 5.7.24, for Linux (x86_64) using EditLine wrapper

六、啟動數據庫，查看初始化密碼

[root@dabiaoge yum.repos.d]# systemctl start mysqld

[root@dabiaoge yum.repos.d]# cat /var/log/mysqld.log | grep root@localhost

2019-01-01T11:10:13.006233Z 1 [Note] A temporary password is generated for root@localhost: Nkw6Uma

七、修改密碼

[root@dabiaoge yum.repos.d]# mysqladmin -uroot -p'Nkw6Umamysqladmin: [Warning] Using a password on the command line interface can be insecure.

Warning: Since password will be sent to server in plain text, use ssl connection to ensure password safety.

//秘鑰要符合復雜性要求，不能小于8位