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
http://www.cnblogs.com/yoyotl/p/6194321.html
打开远程访问：
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%'IDENTIFIED BY '密码' WITH GRANT OPTION;
然后刷新修改，FLUSH PRIVILEGES;
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)
可以看到,root用户的host值为localhost,这代表只能本地连接,将localhost修改为%
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';