==========運維之路

• 環境如下

[[email protected] ~]# cat /etc/redhat-release 
CentOS Linux release 7.5.1804 (Core) 
[[email protected] ~]# systemctl status firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset:
 
 enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)
[[email protected] ~]# getenforce 
Disabled

• 新增 Yum 源

[[email protected] ~]# rpm -ivh https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm

• 檢查 Yum 源 預設版本為 Mysql 8.0

[[email protected] ~]# yum repolist all | grep mysql
mysql80-community/x86_64           MySQL 8.0 Community Server    enabled:     33
mysql80-community-source           MySQL 8.0 Community Server -  disabled

 

• 選擇 Mysql 版本 預設版本為 Mysql 8.0 ，這裡改為 Mysql 5.7

[[email protected] ~]# yum-config-manager --disable mysql80-community
[[email protected] ~]# yum-config-manager --enable mysql57-community

# 或者

[[email protected] ~]# vi /etc/yum.repos.d/mysql-community.repo 

[mysql57-community]
name=MySQL 5.7
 
 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/6/$basearch/
enabled=1              #enabled等於1即為選擇該版本
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
 
[mysql80-community]
name=MySQL 8.0 Community Server
baseurl=http://repo.mysql.com/yum/mysql-8.0-community/el/6/$basearch/
enabled=0              #將預設8.0版本關閉
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

• 下載 Mysql

[[email protected] ~]# yum install -y mysql-community-server

• 啟動 Mysql

[[email protected] ~]# systemctl start mysqld

• 獲取密碼

[[email protected] ~]# grep 'temporary password' /var/log/mysqld.log
2018-09-07T09:18:38.526311Z 1 [Note] A temporary password is generated for [email protected]: m;:)n3;*:1wE

• 連線 Mysql

[[email protected] ~]# mysql -uroot -p
Enter password:        #輸入上一步獲取到的密碼 m;:)n3;*:1wE 

• 更改密碼

# 新密碼不少於8位，至少有1個大小寫字母，1個數字，1個特殊字元
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';
Query OK, 0 rows affected (0.00 sec)

• 來自官方文件

https://dev.mysql.com/doc/refman/8.0/en/linux-installation-yum-repo.html