[root@juny-18 ~]# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)
网络yum源已经配好
检查系统是否自带有MySQL
[root@juny-18 ~]# yum list installed | grep mysql
如果有就用下面这命令来删除
Yum remove -y (安装包名)
第一步 下载yum库
[root@juny-18 ~]# wget //dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
--2017-11-01 23:33:57-- //dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
正在解析主机 dev.mysql.com (dev.mysql.com)... 137.254.60.11
正在连接 dev.mysql.com (dev.mysql.com)|137.254.60.11|:80... 已连接。
中间有省略下载信息
正在保存至: "mysql57-community-release-el7-8.noarch.rpm"
100%[===========================================================================>] 9,116 --.-K/s 用时 0s
2017-11-01 23:35:29 (84.3 MB/s) - 已保存 "mysql57-community-release-el7-8.noarch.rpm" [9116/9116])
安装MySQL的yum源
[root@juny-18 ~]# yum localinstall mysql57-community-release-el7-8.noarch.rpm
已加载插件：fastestmirror, langpacks
正在检查 mysql57-community-release-el7-8.noarch.rpm: mysql57-community-release-el7-8.noarch
mysql57-community-release-el7-8.noarch.rpm 将被安装
正在解决依赖关系
There are unfinished transactions remaining. You might consider running yum-complete-transaction, or "yum-complete-transaction --cleanup-only" and "yum history redo last", first to finish them. If those don't work you'll have to try removing/installing packages by hand (maybe package-cleanup can help).
--> 正在检查事务
---> 软件包 mysql57-community-release.noarch.0.el7-8 将被 安装
--> 解决依赖关系完成
中间有省略下载信息
正在安装 : mysql57-community-release-el7-8.noarch 1/1
验证中 : mysql57-community-release-el7-8.noarch 1/1
已安装:
mysql57-community-release.noarch 0:el7-8
完毕！
检查MySQL源的安装是否成功
[root@juny-18 ~]# yum repolist enabled | grep "mysql.*-community.*"
mysql-connectors-community/x86_64 MySQL Connectors Community 42
mysql-tools-community/x86_64 MySQL Tools Community 51
mysql57-community/x86_64 MySQL 5.7 Community Server 227
修改MySQL的yum源
修改前
修改后
第二步 开始安装MySQL5.7数据库
[root@juny-18 ~]# yum install mysql-community-server -y
正在解决依赖关系
There are unfinished transactions remaining. You might consider running yum-complete-transaction, or "yum-complete-transaction --cleanup-only" and "yum history redo last", first to finish them. If those don't work you'll have to try removing/installing packages by hand (maybe package-cleanup can help).
--> 正在检查事务
---> 软件包 mysql-community-server.x86_64.0.5.7.20-1.el7 将被 安装
--> 正在处理依赖关系 mysql-community-common(x86-64) = 5.7.20-1.el7，它被软件包 mysql-community-server-5.7.20-1.el7.x86_64 需要
--> 正在处理依赖关系 mysql-community-client(x86-64) >= 5.7.9，它被软件包 mysql-community-server-5.7.20-1.el7.x86_64 需要
--> 正在检查事务
---> 软件包 mysql-community-client.x86_64.0.5.7.20-1.el7 将被 安装
--> 正在处理依赖关系 mysql-community-libs(x86-64) >= 5.7.9，它被软件包 mysql-community-client-5.7.20-1.el7.x86_64 需要
---> 软件包 mysql-community-common.x86_64.0.5.7.20-1.el7 将被 安装
--> 正在检查事务
---> 软件包 mariadb-libs.x86_64.1.5.5.52-1.el7 将被 取代
--> 正在处理依赖关系 libmysqlclient.so.18()(64bit)，它被软件包 2:postfix-2.10.1-6.el7.x86_64 需要
--> 正在处理依赖关系 libmysqlclient.so.18(libmysqlclient_18)(64bit)，它被软件包 2:postfix-2.10.1-6.el7.x86_64 需要
---> 软件包 mysql-community-libs.x86_64.0.5.7.20-1.el7 将被 舍弃
--> 正在检查事务
---> 软件包 mysql-community-libs-compat.x86_64.0.5.7.20-1.el7 将被 舍弃
--> 解决依赖关系完成
依赖关系解决
中间有省略下载信息
事务概要
已安装:
mysql-community-libs.x86_64 0:5.7.20-1.el7 mysql-community-libs-compat.x86_64 0:5.7.20-1.el7
mysql-community-server.x86_64 0:5.7.20-1.el7
作为依赖被安装:
mysql-community-client.x86_64 0:5.7.20-1.el7 mysql-community-common.x86_64 0:5.7.20-1.el7
替代:
mariadb-libs.x86_64 1:5.5.52-1.el7
完毕！
第三步、启动MySQL
[root@juny-18 ~]# systemctl start mysqld
获取临时密码
进入mysql
[root@juny-18 ~]# mysql -uroot -pfjw_qP%V0lp#
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 3
Server version: 5.7.20
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql>
修改密码
mysql> set password for 'root'@'localhost'=password('你的密码');
设置开机启动
[root@juny-18 ~]# systemctl enable mysqld
[root@juny-18 ~]# systemctl daemon-reload
@来源