centOS7环境在线安装mysql

第一步检查是否已安装

1:检查是否本地已经安装了mysql

rpm -qa | grep mysql

2:卸载以前的mysql

rpm -e 已经存在的MySQL全名

开始安装

保持联网状态下，现在执行下面命令

yum install mysql

继续执行下面命令：

yum install mysql-devel

执行命令过程中遇到类似这样的都是输入y，继续

总计：8.9 M
总下载量：3.4 M
Is this ok [y/d/N]: 

然后执行下面3个命令:

# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
# rpm -ivh mysql-community-release-el7-5.noarch.rpm
# yum install mysql-community-server

执行完，重启mysql服务。

# service mysqld restart

然后即可登录mysql，初始登录没有密码

[[e-mail] ~]# service mysqld restart
Redirecting to /bin/systemctl restart  mysqld.service
[[e-mail] ~]#  mysql -u root 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.40 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, 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> 

初次登录设置一下密码，设置为123456

mysql> set password for 'root'@'localhost' =password('123456');
Query OK, 0 rows affected (0.02 sec)

退户登录

mysql> exit
Bye
[root@slave1 ~]# 

配置mysql

# vim /etc/my.cnf

在最后面添加下面内容

[mysql]
default-character-set =utf8

配置mysql远程链接

设置远程访问账号:grant all privileges on . to 远程访问用户名@’%’ identified by ‘用户密码’;

mysql> grant all privileges on *.* to [e-mail]'%' identified by '123456';
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> 

配置完即可通过navicat工具远程连接上

如果还是连接不上，估计是防火墙问题，本文不做详细介绍了，目前没有这样的环境作为说明