487/1000：在服务器中安装mysql踩的坑

今天在linux服务器中安装mysql，最终安装成功了。这个过程中也踩过一些坑，现在做一些总结。
在安装过程中遇到报错信息：
Error: Package: 2:postfix-2.10.1-9.el7.x86_64 (@os)
Requires: libmysqlclient.so.18(libmysqlclient_18)(64bit)
Removing: 1:mariadb-libs-5.5.68-1.el7.x86_64 (@os)
libmysqlclient.so.18(libmysqlclient_18)(64bit)
Obsoleted By: mysql-community-libs-5.7.38-1.el6.x86_64 (mysql57-community-dmr)
Not found
Error: Package: mysql-community-server-5.7.38-1.el6.x86_64 (mysql57-community-dmr)
Requires: libsasl2.so.2()(64bit)
Error: Package: 2:postfix-2.10.1-9.el7.x86_64 (@os)
Requires: libmysqlclient.so.18()(64bit)
Removing: 1:mariadb-libs-5.5.68-1.el7.x86_64 (@os)
libmysqlclient.so.18()(64bit)
Obsoleted By: mysql-community-libs-5.7.38-1.el6.x86_64 (mysql57-community-dmr)
~libmysqlclient.so.20()(64bit)
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest

报错截图
解决的命令：vim /etc/yum.repos.d/mysql-community.repo

[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/) # IDO老徐 注： el/6 -> el/7

enabled=1

gpgcheck=0 # IDO老徐注： 1 > 0
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
修改完成后，再次执行命令安装mysql：** yum install mysql-community-server**

安装成功

简单总结一下：这个过程中报错的原因是，默认安装的mysql5.6版本，我想要安装的是5.7版本，配置信息没有修改导致的报错。还要谢谢对象的悉心指导，受益良多~~