https://dev.mysql.com/doc/refman/8.0/en/linux-installation-yum-repo.html#yum-repo-installing-mysql
修改主机名：
[root@iZbp14u808b24i4zml939uZ /]# hostnamectl set -hostname vmcentos7.aliyun
安装新版mysql，现为8.0.23
[root@iZbp14u808b24i4zml939uZ /]# wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm
--2021-01-18 12:01:38-- https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm
Resolving dev.mysql.com (dev.mysql.com)... 137.254.60.11
Connecting to dev.mysql.com (dev.mysql.com)|137.254.60.11|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://repo.mysql.com//mysql80-community-release-el7-3.noarch.rpm [following]
--2021-01-18 12:01:40-- https://repo.mysql.com//mysql80-community-release-el7-3.noarch.rpm
Resolving repo.mysql.com (repo.mysql.com)... 23.40.193.17
Connecting to repo.mysql.com (repo.mysql.com)|23.40.193.17|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 26024 (25K) [application/x-redhat-package-manager]
Saving to: ‘mysql80-community-release-el7-3.noarch.rpm’
100%[===================================================================================================================================================================================================>] 26,024 165KB/s in 0.2s
2021-01-18 12:01:40 (165 KB/s) - ‘mysql80-community-release-el7-3.noarch.rpm’ saved [26024/26024]
[root@iZbp14u808b24i4zml939uZ /]# yum -y install mysql80-community-release-el7-3.noarch.rpm
Loaded plugins: fastestmirror
Examining mysql80-community-release-el7-3.noarch.rpm: mysql80-community-release-el7-3.noarch
Marking mysql80-community-release-el7-3.noarch.rpm to be installed
Resolving Dependencies
--> Running transaction check
---> Package mysql80-community-release.noarch 0:el7-3 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
=============================================================================================================================================================================================================================================
Package Arch Version Repository Size
=============================================================================================================================================================================================================================================
Installing:
mysql80-community-release noarch el7-3 /mysql80-community-release-el7-3.noarch 31 k
Transaction Summary
=============================================================================================================================================================================================================================================
Install 1 Package
Total size: 31 k
Installed size: 31 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : mysql80-community-release-el7-3.noarch 1/1
Verifying : mysql80-community-release-el7-3.noarch 1/1
Installed:
mysql80-community-release.noarch 0:el7-3
Complete!
[root@iZbp14u808b24i4zml939uZ /]# yum install mysql-community-server
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
mysql-connectors-community | 2.6 kB 00:00:00
mysql-tools-community | 2.6 kB 00:00:00
mysql80-community | 2.6 kB 00:00:00
(1/3): mysql-connectors-community/x86_64/primary_db | 72 kB 00:00:00
(2/3): mysql-tools-community/x86_64/primary_db | 85 kB 00:00:00
(3/3): mysql80-community/x86_64/primary_db | 142 kB 00:00:01
Resolving Dependencies
--> Running transaction check
---> Package mysql-community-server.x86_64 0:8.0.23-1.el7 will be installed
--> Processing Dependency: mysql-community-common(x86-64) = 8.0.23-1.el7 for package: mysql-community-server-8.0.23-1.el7.x86_64
--> Processing Dependency: mysql-community-client(x86-64) >= 8.0.11 for package: mysql-community-server-8.0.23-1.el7.x86_64
--> Processing Dependency: libaio.so.1(LIBAIO_0.1)(64bit) for package: mysql-community-server-8.0.23-1.el7.x86_64
--> Processing Dependency: libaio.so.1(LIBAIO_0.4)(64bit) for package: mysql-community-server-8.0.23-1.el7.x86_64
--> Processing Dependency: libaio.so.1()(64bit) for package: mysql-community-server-8.0.23-1.el7.x86_64
--> Running transaction check
---> Package libaio.x86_64 0:0.3.109-13.el7 will be installed
---> Package mysql-community-client.x86_64 0:8.0.23-1.el7 will be installed
--> Processing Dependency: mysql-community-client-plugins = 8.0.23-1.el7 for package: mysql-community-client-8.0.23-1.el7.x86_64
--> Processing Dependency: mysql-community-libs(x86-64) >= 8.0.11 for package: mysql-community-client-8.0.23-1.el7.x86_64
---> Package mysql-community-common.x86_64 0:8.0.23-1.el7 will be installed
--> Running transaction check
---> Package mariadb-libs.x86_64 1:5.5.68-1.el7 will be obsoleted
--> Processing Dependency: libmysqlclient.so.18()(64bit) for package: 2:postfix-2.10.1-9.el7.x86_64
--> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package: 2:postfix-2.10.1-9.el7.x86_64
---> Package mysql-community-client-plugins.x86_64 0:8.0.23-1.el7 will be installed
---> Package mysql-community-libs.x86_64 0:8.0.23-1.el7 will be obsoleting
--> Running transaction check
---> Package mysql-community-libs-compat.x86_64 0:8.0.23-1.el7 will be obsoleting
--> Finished Dependency Resolution
Dependencies Resolved
=============================================================================================================================================================================================================================================
Package Arch Version Repository Size
=============================================================================================================================================================================================================================================
Installing:
mysql-community-libs x86_64 8.0.23-1.el7 mysql80-community 4.6 M
replacing mariadb-libs.x86_64 1:5.5.68-1.el7
mysql-community-libs-compat x86_64 8.0.23-1.el7 mysql80-community 1.2 M
replacing mariadb-libs.x86_64 1:5.5.68-1.el7
mysql-community-server x86_64 8.0.23-1.el7 mysql80-community 518 M
Installing for dependencies:
libaio x86_64 0.3.109-13.el7 base 24 k
mysql-community-client x86_64 8.0.23-1.el7 mysql80-community 48 M
mysql-community-client-plugins x86_64 8.0.23-1.el7 mysql80-community 237 k
mysql-community-common x86_64 8.0.23-1.el7 mysql80-community 621 k
Transaction Summary
=============================================================================================================================================================================================================================================
Install 3 Packages (+4 Dependent packages)
Total download size: 573 M
Is this ok [y/d/N]: y
Downloading packages:
(1/7): libaio-0.3.109-13.el7.x86_64.rpm | 24 kB 00:00:00
warning: /var/cache/yum/x86_64/7/mysql80-community/packages/mysql-community-client-plugins-8.0.23-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY ] 139 kB/s | 264 kB 01:10:24 ETA
Public key for mysql-community-client-plugins-8.0.23-1.el7.x86_64.rpm is not installed
(2/7): mysql-community-client-plugins-8.0.23-1.el7.x86_64.rpm | 237 kB 00:00:01
(3/7): mysql-community-common-8.0.23-1.el7.x86_64.rpm | 621 kB 00:00:00
(4/7): mysql-community-libs-8.0.23-1.el7.x86_64.rpm | 4.6 MB 00:00:01
(5/7): mysql-community-libs-compat-8.0.23-1.el7.x86_64.rpm | 1.2 MB 00:00:00
(6/7): mysql-community-client-8.0.23-1.el7.x86_64.rpm | 48 MB 00:00:09
(7/7): mysql-community-server-8.0.23-1.el7.x86_64.rpm | 518 MB 00:01:48
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 5.1 MB/s | 573 MB 00:01:51
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
Importing GPG key 0x5072E1F5:
Userid : "MySQL Release Engineering <mysql-build@oss.oracle.com>"
Fingerprint: a4a9 4068 76fc bd3c 4567 70c8 8c71 8d3b 5072 e1f5
Package : mysql80-community-release-el7-3.noarch (@/mysql80-community-release-el7-3.noarch)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
Is this ok [y/N]: y
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : mysql-community-common-8.0.23-1.el7.x86_64 1/8
Installing : mysql-community-client-plugins-8.0.23-1.el7.x86_64 2/8
Installing : mysql-community-libs-8.0.23-1.el7.x86_64 3/8
Installing : mysql-community-client-8.0.23-1.el7.x86_64 4/8
Installing : libaio-0.3.109-13.el7.x86_64 5/8
Installing : mysql-community-server-8.0.23-1.el7.x86_64 6/8
Installing : mysql-community-libs-compat-8.0.23-1.el7.x86_64 7/8
Erasing : 1:mariadb-libs-5.5.68-1.el7.x86_64 8/8
Verifying : mysql-community-client-8.0.23-1.el7.x86_64 1/8
Verifying : mysql-community-libs-compat-8.0.23-1.el7.x86_64 2/8
Verifying : mysql-community-libs-8.0.23-1.el7.x86_64 3/8
Verifying : mysql-community-client-plugins-8.0.23-1.el7.x86_64 4/8
Verifying : mysql-community-server-8.0.23-1.el7.x86_64 5/8
Verifying : libaio-0.3.109-13.el7.x86_64 6/8
Verifying : mysql-community-common-8.0.23-1.el7.x86_64 7/8
Verifying : 1:mariadb-libs-5.5.68-1.el7.x86_64 8/8
Installed:
mysql-community-libs.x86_64 0:8.0.23-1.el7 mysql-community-libs-compat.x86_64 0:8.0.23-1.el7 mysql-community-server.x86_64 0:8.0.23-1.el7
Dependency Installed:
libaio.x86_64 0:0.3.109-13.el7 mysql-community-client.x86_64 0:8.0.23-1.el7 mysql-community-client-plugins.x86_64 0:8.0.23-1.el7 mysql-community-common.x86_64 0:8.0.23-1.el7
Replaced:
mariadb-libs.x86_64 1:5.5.68-1.el7
Complete!
[root@iZbp14u808b24i4zml939uZ /]# systemctl start mysqld.service
[root@iZbp14u808b24i4zml939uZ /]# systemctl enable mysqld.service
[root@iZbp14u808b24i4zml939uZ /]# systemctl status mysqld.service
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2021-01-18 12:30:20 CST; 59s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Main PID: 11129 (mysqld)
Status: "Server is operational"
CGroup: /system.slice/mysqld.service
└─11129 /usr/sbin/mysqld
Jan 18 12:30:10 iZbp14u808b24i4zml939uZ systemd[1]: Starting MySQL Server...
Jan 18 12:30:20 iZbp14u808b24i4zml939uZ systemd[1]: Started MySQL Server.
[root@iZbp14u808b24i4zml939uZ /]# vim /var/log/mysqld.log
2021-01-18T04:30:15.128686Z 6 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: A3%?y_SDfGKZ
[root@iZbp14u808b24i4zml939uZ /]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 8
Server version: 8.0.23
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
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>
mysql> set global validate_password.policy=0;
mysql> set global validate_password.length=4;
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
mysql> exit
Bye
[root@iZbp14u808b24i4zml939uZ /]# yum remove mysql80-community-release-el7-3.noarch
Loaded plugins: fastestmirror
Resolving Dependencies
--> Running transaction check
---> Package mysql80-community-release.noarch 0:el7-3 will be erased
--> Finished Dependency Resolution
Dependencies Resolved
=======================================================================================================
Package Arch Version Repository Size
=======================================================================================================
Removing:
mysql80-community-release noarch el7-3 @/mysql80-community-release-el7-3.noarch 31 k
Transaction Summary
=======================================================================================================
Remove 1 Package
Installed size: 31 k
Is this ok [y/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Erasing : mysql80-community-release-el7-3.noarch 1/1
Verifying : mysql80-community-release-el7-3.noarch 1/1
Removed:
mysql80-community-release.noarch 0:el7-3
Complete!
[root@iZbp14u808b24i4zml939uZ /]# rm -rf mysql80-community-release-el7-3.noarch.rpm
在CentOS中mysql的主要配置所在的目录：
1 /etc/my.cnf 这是mysql的主配置文件 2 /var/lib/mysql mysql数据库的数据库文件存放位置 3 /var/log mysql数据库的日志输出存放位置
$ /usr/local/mysql/bin/mysql -u root -p
--输入密码
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| seckill |
| sys |
| test |
+--------------------+
6 rows in set (0.00 sec)
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
--查询当前数据库相关信息
mysql> select host,user,authentication_string,plugin from user;
+-----------+------------------+------------------------------------------------------------------------+-----------------------+
| host | user | authentication_string | plugin |
+-----------+------------------+------------------------------------------------------------------------+-----------------------+
| localhost | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | caching_sha2_password |
| localhost | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | caching_sha2_password |
| localhost | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | caching_sha2_password |
| localhost | root | *84AAC12F54AB666ECFC2A83C676908C8BBC381B1 | mysql_native_password |
+-----------+------------------+------------------------------------------------------------------------+-----------------------+
4 rows in set (0.00 sec)
--将root用户设置为所有地址可登录，原来是localhost表示只用本机可登录
mysql> update user set host='%' where user='root';
Query OK, 1 row affected (0.01 sec)
Rows matched: 1 Changed: 1 Warnings: 0
--刷新权限
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
--将用户root密码设置为永不过期
mysql> alter user 'root'@'%' identified by '12345678' password expire never;
Query OK, 0 rows affected (0.01 sec)
--将root用户密码加密方式改为mysql_native_password ，上面查到root用户密码的加密方式为caching_sha2_password
mysql> alter user 'root'@'%' identified with mysql_native_password by '12345678';
Query OK, 0 rows affected (0.00 sec)
--刷新权限，在别的机器上即可登录
mysql> flush privileges;