centos 怎么安装mysql

发布网友 发布时间：2022-02-26 19:21

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懂视网 时间：2022-02-26 23:42

产品型号：Thinkpad E15

系统版本：centos7

软件版本：mysql 5.7

mysql安装教程

1．使用yum安装mysql数据库的软件包 

[root@xuegod63 ~]# yum -y install mariadb-server mariadb 

注：  

mariadb-server  #MariaDB数据库 

mariadb      # MariaDB服务器Linux下客户端 

注：从centos7系统开始，系统中自带的mysql数据库变成了mariadb-server，mariadb-server和mysql操作上一样。mariadb-server是mysql的一个分支。

2．启动数据库服务

[root@xuegod63 ~]# systemctl start  mariadb #启动MariaDB服务

[root@xuegod63 ~]# systemctl enable  mariadb #设置开启自动启动MariaDB服务

3. 安装完mariadb-server后，运行mysql_secure_installation去除安全隐患

[root@xuegod63 ~]# mysql_secure_installation #进入安全配置导向

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL

SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!

In order to log into MySQL to secure it, we'll need the current

password for the root user. If you've just installed MySQL, and

you haven't set the root password yet, the password will be blank,

so you should just press enter here.

Enter current password for root (enter for none):  #初次运行直接回车，因为root用户没有密码

OK, successfully used password, moving on…

Setting the root password ensures that nobody can log into the MySQL

root user without the proper authorisation.

Set root password? [Y/n] Y #是否设置root用户密码,输入Y

New password: 123456  #新密码123456

Re-enter new password: 123456

Password updated successfully!

。。。

Remove anonymous users? [Y/n] Y  #是否删除匿名用户,生产环境建议删除，所以直接回车或Y

 ... Success!

Normally, root should only be allowed to connect from 'localhost'.  This

ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] Y #是否禁止root远程登录,根据自己的需求选择Y/n并回车,建议禁止

 ... Success!

By default, MariaDB comes with a database named 'test' that anyone can

access.  This is also intended only for testing, and should be removed

before moving into a production environment.

Remove test database and access to it? [Y/n] Y  #是否删除test数据库,直接回车或Y

 - Dropping test database...

 ... Success!

 - Removing privileges on test database...

 ... Success!

Reloading the privilege tables will ensure that all changes made so far

will take effect immediately.

Reload privilege tables now? [Y/n] Y  #是否重新加载权限表，直接回车

 ... Success!

Cleaning up...

All done!  If you've completed all of the above steps, your MariaDB

installation should now be secure.

Thanks for using MariaDB!

… Success!

至此数据库安装成功。

4. 登录数据库

[root@xuegod63 ~]# mysql -u root -p123456 

MariaDB [(none)]> show databases;    #没有test数据库 #执行时，所有命令以；号结尾 

+-------------------------+ 

| Database | 

+-------------------------+ 

| information_schema | 

| mysql | 

| ucenter | 

+-------------------------+ 

3 rows in set (0.00 sec) 

MariaDB [(none)]> exit #退出命令可以加分号，也可以不加分号。

总结：

1、使用yum安装mysql数据库的软件包 

2、启动数据库服务

3、运行mysql_secure_installation去除安全隐患

4、登录数据库

热心网友 时间：2022-02-26 20:50

热心网友 时间：2022-02-26 22:25

首先查看centos7上有没有安装过mysql ,一定要卸载干净残留，不然会安装或启动失败。

yum list installed mysql*列出后如果有就删除

删除mysql

sudo yum remove mysql-community-*rm -rf /var/lib/mysql
rm /etc/my.cnf


安装yum源

wget https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm
sudo yum instal   mysql80-community-release-el7-1.noarch.rpm


查看是否安装成功

sudo yum repolist all|grep mysql

成功安装

配置要安装的mysql版本

sudo vim /etc/yum.repos.d/mysql-community.repo

enabled 为1表示启用，将要安装的版本的enabled改为1后保存

配置repo

安装启动mysql
sudo yum install mysql-community-server.x86_64

等待安装好后启动mysql

sudo service mysqld start      //启动mysqlsudo service mysqld status   //查看mysql状态sudo systemctl enable mysqld //配置开机启动


管理账户

mysql安装完成之后，在/var/log/mysqld.log文件中给root生成了一个默认密码。通过下面的方式找到root默认密码，然后登录mysql进行修改：

grep 'temporary password' /var/log/mysqld.log  //找到默认密码mysql -uroot -p
set password for 'root'@'localhost'=password('NEWPASSWORD'); 或者ALTER USER 'root'@'localhost' IDENTIFIED BY 'NEWPASSWORD';  // 修改密码,注意密码要复杂一些，否则会不能通过。


添加远程用户

GRANT ALL PRIVILEGES ON *.* TO 'username'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;


查看并修改编码

mysql -u root -p
show variables like '%char%;
看到有的编码不是 utf8
更改配置文件
vim /etc/my.cnf
在[mysqld]下面添加以下两句

character_set_server=utf8
collation-server=utf8_general_ci
在[client]下面添加
default-character-set=utf8

改成功

注意修改后只会对以后创建的数据库生效。

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