CentOS 8安装Mysql8并设置开机自启动

0. 看起来mysql又提供yum安装了。

yum install mysql-server

后面的没时间可以不看了。

先要安装wget

yum -y install wget

1. 下载rpm安装文件

wget http://repo.mysql.com/mysql-community-release-el7.rpm

2. 执行rpm安装

rpm -ivh mysql-community-release-el7.rpm

依赖解析完成后，出现下列选项：

1 Dependencies Resolved

2

3 ================================================================================================================================================================

4 Package Arch Version Repository Size

5 ================================================================================================================================================================

6 Installing:

7 mysql-community-libs x86_64 5.6.32-2.el7 mysql56-community 2.0 M

8 replacing mariadb-libs.x86_64 1:5.5.47-1.el7_2

9 mysql-community-server x86_64 5.6.32-2.el7 mysql56-community 59 M

10 Installing for dependencies:

11 mysql-community-client x86_64 5.6.32-2.el7 mysql56-community 19 M

12 mysql-community-common x86_64 5.6.32-2.el7 mysql56-community 256 k

13 perl-Compress-Raw-Bzip2 x86_64 2.061-3.el7 base 32 k

14 perl-Compress-Raw-Zlib x86_64 1:2.061-4.el7 base 57 k

15 perl-DBI x86_64 1.627-4.el7 base 802 k

16 perl-IO-Compress noarch 2.061-2.el7 base 260 k

17 perl-Net-Daemon noarch 0.48-5.el7 base 51 k

18 perl-PlRPC noarch 0.2020-14.el7 base 36 k

19

20 Transaction Summary

21 ================================================================================================================================================================

22 Install 2 Packages (+8 Dependent packages)

23

24 Total download size: 82 M

25 Is this ok [y/d/N]:

3. 可以看出，server和client都被选择安装。选择y，自动下载安装。

4. 安装完成后，启动Mysql。

systemctl start  mysqld.service

启动方式

1、使用 service 启动：service mysqld start

2、使用 mysqld 脚本启动：/etc/inint.d/mysqld start

二、停止

1、使用 service 启动：service mysqld stop

2、使用 mysqld 脚本启动：/etc/inint.d/mysqld stop

三、重启

1、使用 service 启动：service mysqld restart

2、使用 mysqld 脚本启动：/etc/inint.d/mysqld restart

登录mysql：mysql -u root -p

5. 设置root密码。

​

​ALTER USER 'root'@'localhost' IDENTIFIED BY '密码';​

​​（注意要切换到mysql数据库，使用​

​use mysql​

​）

/*update user set password=password("123456") where user='root';*/

6. 开机自启动。

1 vim /etc/rc.local

2 添加service mysqld start

启动Mysql服务

　　　　　　systemctl start mysqld

设置开机启动

　　　　　　 systemctl enable mysqld

　　　　　　 systemctl daemon-reload

7.重要更新：

新的rpm安装文件没有自动yum安装的脚本了，需要手动执行yum安装。

即步骤2之后执行yum install mysql-server即可。

8.关于自启动

步骤6只适用于mysqld没有自启动的条件下。

如果默认mysql是自启动的，可能和rc.local中的自启动出现乱序之类的问题。

更稳妥的一个解决办法见：

CentOS 7 程序自启动的问题

打开远程访问：

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%'IDENTIFIED BY '密码' WITH GRANT OPTION;

1：linux登录mysql

[root@localhost mysql]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 19
Server version: 8.0.13 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>      

2：查看user表,修改连接级别

mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> select host,user from user;
+-----------+------------------+
| host      | user             |
+-----------+------------------+
| localhost | root             |
| localhost | mysql.infoschema |
| localhost | mysql.session    |
| localhost | mysql.sys        |
+-----------+------------------+
4 rows in set (0.00 sec)      

update user set host='%' where user='root';      

3：可能你觉得到这一步就完事了,但是使用navicat连接测试时,会提示无法解析主机名相关的错误,这是mysql8的一些安全策略的问题,具体请左转google,解决办法如下

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'yourpassword';