Table of contents
1. The whole process of MySQL8.0 green version installation
1. Download the installation package
2. Unzip the compressed package
3. Create an empty data folder
6. Configure environment variables
7. Environment initialization and install
2. Remote connection confirmation
3. Through the tool connection test
Error running mysqld --initialize-insecure --user=mysql
1. The whole process of MySQL8.0 green version installation
1. Download the installation package
Official MySQL download address:
MySQL :: Download MySQL Community Server
The version selected here is: MySQL Community Server 8.0.34
Optimistic, we use it ourselves, just use the community version. If you go to the public network, you must buy a server.
No need to log in, just click to download.
2. Unzip the compressed package
Unzip it after downloading
Decompression effect.
3. Create an empty data folder
Here we need to create a [data] empty folder.
4. Create my.ini file
The official website does not provide the my-default.ini file in the binary package since 5.7.18. We need to create a my.ini file ourselves.
5. Edit my.ini file
The following code needs to manually rewrite the specific location by yourself. A total of 3 positions have been modified, so be optimistic.
this is mine.
[mysqld]
basedir ="D://save//exe//sql//mysql-8.0.34-winx64" # 设置mysql的安装目录
datadir ="D://save//exe//sql//mysql-8.0.34-winx64//data" # 设置mysql数据库的数据的存放目录，必须是data，或者是//xxx/data
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
#服务端的编码方式
character-set-server=utf8mb4
[client]
#客户端编码方式，最好和服务端保存一致
loose-default-character-set=utf8mb4
# 端口号设置
port=3306
[WinMySQLadmin]
Server = "D://save//exe//sql//mysql-8.0.34-winx64//bin//mysqld.exe"6. Configure environment variables
Open My Computer, go to Properties, and select Advanced System Settings.
Advanced System Settings
The complete steps of adding environment variables can be added in the order of the pictures.
7. Environment initialization and install
Here you need to enter the command. Since we have set the environment variable, we can directly open the administrator's cmd and run the following command.
mysqld --initialize-insecure --user=mysql
mysqld -install
Be sure to use administrator status.
running result:
Files under the [data] folder after initialization.
It can be seen that the generation is successful, and the registration information of MySQL will be added in the registry after generation.
8. Start the MySQL service
net start mysqlStart effect, success.
9. Login to MySQL
Since no password is set, the current password is empty. The login statement is:
mysql -uroot -pWhen encountering password, press Enter directly.
10. Modify the password
The mysql library is required.
use mysql;
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';In this case, the pwd:root corresponding to userName:root is convenient and easy to use.
11. Refresh permissions
This command to refresh permissions must be remembered, it is often used.
flush privileges;
exit;
12. Login verification
Use the pwd we set to log in and confirm that the login is successful.
2. Open MySQL remote access
1. Modify permissions
We use the mysql library, modify the [host] of the root user to [%], and then refresh the permissions to complete the change of remote access permissions.
Full statement:
use mysql;
select User,authentication_string,Host from user;
update user set host='%' where user='root';
flush privileges;
select User,authentication_string,Host from user;2. Remote connection confirmation
The parameters in the login method need to add -h to access the ip address
mysql -uroot -h 192.168.0.101 -p
We set pwd, so pwd input is also required.
You can see that the login is successful.
3. Through the tool connection test
Here we pass the Navicat Premium connection test, and we can see that the access is successful.
3. Delete MySQL perfectly
1. Close the MySQL service
Here you can close it directly through the stop command.
net stop mysqlNote the use of start and stop.
2. Delete the registry
Open the registry [regedit].
Path 1:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\EventLog\Application\MySQLD Service
Path 2:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EventLog\Application\MySQLD Service
3. Delete the MySQL service
Excuting an order
mysqld -remove
If you see [successfully removed], it means the deletion is successful.
Look at your own needs. Personally, I don’t recommend deleting the local MySQL, keep it for use, after all, the local files don’t matter, keep one my.ini file for backup.
4. Abnormal
Error running mysqld --initialize-insecure --user=mysql
Explain that our [my.ini] file has abnormal spaces or something, go to see if there is any abnormality in the my.ini file, check it carefully, use [//] to replace [\] as the separator of the path.