[root@C8-194 ~]# yum -y install mysql-community-server
Last metadata expiration check: 0:28:45 ago on Wed 12 May 2021 05:03:54 PM CST.
No match for argument: mysql-community-server
Error: Unable to find a match: mysql-community-server
[root@C8-194 ~]# systemctl enable --now mysqld
Created symlink /etc/systemd/system/multi-user.target.wants/mysqld.service → /usr/lib/systemd/system/mysqld.service.
[root@C8-194 ~]# systemctl status mysqld
● mysqld.service - MySQL 8.0 database server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since Wed 2021-05-12 17:36:06 CST; 48s ago
Process: 2879 ExecStartPost=/usr/libexec/mysql-check-upgrade (code=exited, status=0/SUCCESS)
Process: 2753 ExecStartPre=/usr/libexec/mysql-prepare-db-dir mysqld.service (code=exited, status=0/SUCCESS)
Process: 2728 ExecStartPre=/usr/libexec/mysql-check-socket (code=exited, status=0/SUCCESS)
Main PID: 2835 (mysqld)
Status: "Server is operational"
Tasks: 39 (limit: 11353)
Memory: 432.9M
CGroup: /system.slice/mysqld.service
└─2835 /usr/libexec/mysqld --basedir=/usr
May 12 17:36:00 C8-194 systemd[1]: Starting MySQL 8.0 database server...
May 12 17:36:00 C8-194 mysql-prepare-db-dir[2753]: Initializing MySQL database
May 12 17:36:06 C8-194 systemd[1]: Started MySQL 8.0 database server.
查看端口是否已打开
[root@C8-194 ~]# ss -ntl | grep 3306
LISTEN 0 70 *:33060 *:*
LISTEN 0 128 *:3306 *:*
[root@C8-194 ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.21 Source distribution
查看数据库状态
mysql> status
mysql> status
--------------
mysql Ver 8.0.21 for Linux on x86_64 (Source distribution)
Connection id: 8
Current database:
Current user: root@localhost
SSL: Not in use
Current pager: stdout
Using outfile: ''
Using delimiter: ;
Server version: 8.0.21 Source distribution
Protocol version: 10
Connection: Localhost via UNIX socket
Server characterset: utf8mb4
Db characterset: utf8mb4
Client characterset: utf8mb4
Conn. characterset: utf8mb4
UNIX socket: /var/lib/mysql/mysql.sock
Binary data as: Hexadecimal
Uptime: 8 min 28 sec
Threads: 2 Questions: 6 Slow queries: 0 Opens: 137 Flush tables: 3 Open tables: 55 Queries per second avg: 0.011
--------------
[root@C8-194 ~]# mysql_secure_installation
Securing the MySQL server deployment.
Connecting to MySQL using a blank password.
VALIDATE PASSWORD COMPONENT can be used to test passwords
and improve security. It checks the strength of password
and allows the users to set only those passwords which are
secure enough. Would you like to setup VALIDATE PASSWORD component?
Press y|Y for Yes, any other key for No: y
There are three levels of password validation policy:
LOW Length >= 8
MEDIUM Length >= 8, numeric, mixed case, and special characters
STRONG Length >= 8, numeric, mixed case, special characters and dictionary file
Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG:
Invalid option provided.
There are three levels of password validation policy:
LOW Length >= 8
MEDIUM Length >= 8, numeric, mixed case, and special characters
STRONG Length >= 8, numeric, mixed case, special characters and dictionary file
Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG:
Invalid option provided.
There are three levels of password validation policy:
LOW Length >= 8
MEDIUM Length >= 8, numeric, mixed case, and special characters
STRONG Length >= 8, numeric, mixed case, special characters and dictionary file
Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 0
Please set the password for root here.
New password:
Re-enter new password:
Estimated strength of the password: 25
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No): y
... Failed! Error: Your password does not satisfy the current policy requirements
New password:
Re-enter new password:
Estimated strength of the password: 50
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No):
New password:
Re-enter new password:
Estimated strength of the password: 50
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No): y
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.
Remove anonymous users? (Press y|Y for Yes, any other key for No): 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? (Press y|Y for Yes, any other key for No): y
Success.
By default, MySQL 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? (Press y|Y for Yes, any other key for No): 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? (Press y|Y for Yes, any other key for No): y
Success.
All done!
使用更改过的密码登录
mysql -uroot -p'aaaaaaaa'
[root@C8-194 ~]# mysql
ERROR 1045 (28000): Access denied for user 'root'@'localhost'(using password: NO)[root@C8-194 ~]# mysql -uroot -p aaaaaaaa
Enter password:
ERROR 1049 (42000): Unknown database 'aaaaaaaa'[root@C8-194 ~]# mysql -uroot -p'aaaaaaaa'
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 13
Server version: 8.0.21 Source distribution
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>
再次查看自带数据库内容
剩下的都是系统数据库了
mysql> show;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema || mysql || performance_schema || sys |
+--------------------+
4 rows inset(0.00 sec)
CentOS8安装MySQL教程
本文详细介绍如何在CentOS8上通过yum安装MySQL 8.0，并配置服务启动及基本的安全设置。包括解决安装过程中遇到的问题，如选择正确的安装包等。
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