ubuntu下mysql连接失败怎么办

sudo apt update
sudo apt install mysql-server

sudo systemctl status mysql

sudo systemctl start mysql

sudo ufw allow 3306/tcp

bind-address = 0.0.0.0

sudo mysql -u root -p

GRANT ALL PRIVILEGES ON *.* TO 'your_username'@'%' IDENTIFIED BY 'your_password' WITH GRANT OPTION;
FLUSH PRIVILEGES;
EXIT;

ping your_mysql_server_ip

import mysql.connector

try:
    mydb = mysql.connector.connect(
        host="your_mysql_server_ip",
        user="your_username",
        password="your_password",
        database="your_database"
    )
    print("Connection successful")
except mysql.connector.Error as err:
    print(f"Error: {err}")