mysql连不上localhost

sudo systemctl status mysql

sudo systemctl start mysql

sudo netstat -tuln | grep 3306

mysql -u root -p

SHOW GRANTS FOR 'your_username'@'localhost';

sudo ufw allow 3306

import mysql.connector

try:
    connection = mysql.connector.connect(
        host="localhost",
        user="your_username",
        password="your_password",
        database="your_database"
    )
    if connection.is_connected():
        db_info = connection.get_server_info()
        print("Connected to MySQL Server version ", db_info)
        cursor = connection.cursor()
        cursor.execute("select database();")
        record = cursor.fetchone()
        print("You're connected to database: ", record)
except mysql.connector.Error as e:
    print("Error while connecting to MySQL", e)
finally:
    if connection.is_connected():
        cursor.close()
        connection.close()
        print("MySQL connection is closed")