【centos7 + MySQL5.7 安装】centos7 安装MySQL5.7

大家好，又见面了，我是你们的朋友全栈君。

说明：我们安装MySQL位置在 /usr/local 下

第一步、下载MySQL 安装包：

[root@localhost local]# wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

安装mysql 安装源：

[root@localhost local]# yum -y localinstall mysql57-community-release-el7-11.noarch.rpm 

第二步，在线安装MySQL

[root@localhost local]# yum -y install mysql-community-server

等待时间比较久：

第三步、启动mysql 服务

[root@localhost local]# systemctl start mysqld

第四步，设置开机启动

[root@localhost local]# systemctl enable mysqld
 
[root@localhost local]# systemctl daemon-reload

第五步，修改root登录密码

mysql安装完成之后，会在/var/log/mysqld.log文件中给root生成了一个临时的默认密码。

[root@localhost local]# vim /var/log/mysqld.log

记住初始密码：
修改root 密码

[root@localhost local]# mysql -u root -p

mysql>  ALTER USER 'root'@'localhost' IDENTIFIED BY 'daasan7ujm^YHN';
Query OK, 0 rows affected (0.00 sec)
# 设置远程登录
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'daasan7ujm^YHN' WITH GRANT OPTION;
Query OK, 0 rows affected, 1 warning (0.00 sec)

第六步，退出

mysql> exit

第七步，防火墙开放3306端口

[root@localhost sysconfig]# cd /etc/sysconfig/
[root@localhost sysconfig]# vim iptables
#添加代码如下
-A INPUT -p tcp --dport 3306 -j ACCEPT

第八步，重启防火墙。

[root@localhost sysconfig]# service iptables restart

第九步，配置mysql默认编码为utf-8

[root@localhost sysconfig]# vim /etc/my.cnf

添加如下代码

character_set_server=utf8
init_connect='SET NAMES utf8'

:wq 保存退出

第十步，重启MySQL

[root@localhost data]# systemctl restart mysqld

第十一步， root 用户登录查看编码

[root@localhost sysconfig]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.29 MySQL Community Server (GPL)

Copyright (c) 2000, 2020, 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> show variables like '%character%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       |
| character_set_connection | utf8                       |
| character_set_database   | utf8                       |
| character_set_filesystem | binary                     |
| character_set_results    | utf8                       |
| character_set_server     | utf8                       |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)

mysql> 

最后本地连接测试：