rpm 安裝mysql5.7

什麼都不要想先去官網看看：

https://dev.mysql.com/doc/mysql-yum-repo-quick-guide/en/#repo-qg-yum-installing

repo 源下載地址： https://dev.mysql.com/downloads/repo/yum/

最好先su root 先切換到root

rpm -ivh mysql80-community-release-el8-1.noarch.rpm

然後 yum repolist all | grep mysql 看下是不是有mysql的信息,裏面應該沒有5.7的源，需要修改

/etc/yum.repo.d/mysql-community.repo 文件

vi /etc/yum.repo.d/mysql-community.repo

官網的是：

[mysql57-community]

name=MySQL 5.7 Community Server

baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/6/$basearch/

enabled=1

gpgcheck=1

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

但是會報錯，少了 libsasl2.so.2()(64bit) 需要改成：

[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

：wq 保存

查看mysql安裝源 yum repolist enabled | grep mysql

如果存在兩個mysql*-community enable 需要禁掉一個，最好修改源的時候將其中一個 enabled=0

如我的： yum-config-manager --disable mysql80-community

變成上圖只有一個enable就可以開始下一步了

還需要執行 yum module disable mysql 官網這樣解釋的

(EL8 systems only) EL8-based systems such as RHEL8 and Oracle Linux 8 include a MySQL module that is enabled by default. Unless this module is disabled, it masks packages provided by MySQL repositories. To disable the included module and make the MySQL repository packages visible, use the following command (for dnf-enabled systems, replace yum in the command with dnf

（僅限EL8系統）基於RHEL8和Oracle Linux 8的基於EL8的系統包括默認情況下啓用的MySQL模塊。除非禁用此模塊，否則它將屏蔽MySQL存儲庫提供的軟件包。要禁用包含的模塊並使MySQL存儲庫軟件包可見，請使用以下命令（對於啓用了dnf的系統，請將該命令中的yum替換爲dnf

接下來就可以愉快的安裝了 yum install mysql-community-server

安裝完成後開啓mysql systemctl start mysqld

查看是否啓動 systemctl status mysqld

接下來就可以進去看看了 mysql -u root -p 密碼在 /var/log/mysqld.log