1、从官网获取rpm包压缩文件，选择版本号为偶数稳定版本
3、安装过程中报mariadb-libs包冲突，强制卸载[root@vm-122-187 mysql_rpm]# rpm -e mariadb-libs-5.5.56-2.el7.x86_64error: Failed dependencies: libmysqlclient.so.18()(64bit) is needed by (installed) postfix-2:2.10.1-6.el7.x86_64 libmysqlclient.so.18(libmysqlclient_18)(64bit) is needed by (installed) postfix-2:2.10.1-6.el7.x86_64[root@vm-122-187 mysql_rpm]# rpm -ivh mysql-community-common-5.7.20-1.el7.x86_64.rpm c^C[root@vm-122-187 mysql_rpm]# rpm -e mariadb-libs-5.5.56-2.el7.x86_64 --nodeps[root@vm-122-187 mysql_rpm]# rpm -ivh mysql-community-common-5.7.20-1.el7.x86_64.rpmwarning: mysql-community-common-5.7.20-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEYPreparing... ################################# [100%]Updating / installing... 1:mysql-community-common-5.7.20-1.e################################# [100%][root@vm-122-187 mysql_rpm]#
5、rpm -ivh mysql-community-client-5.7.20-1.el7.x86_64.rpm
7、执行初始化命令mysqld --initialize --user=mysql
9、启动mysql服务并用初始化的root密码进行登录，第一次登录之后强制要求修改root密码
