安裝mysql後必須要做的一件事

Step 1. 檢查默認賬戶和密碼

$cat /etc/mysql/debian.cnf  # 在ubuntu下查看默認賬戶名和密碼

會看到

[client]
host     = localhost
user     = debian-sys-maint
password = ****************
socket   = /var/run/mysqld/mysqld.sock
[mysql_upgrade]
host     = localhost
user     = debian-sys-maint
password = ****************
socket   = /var/run/mysqld/mysqld.sock

Step 2. 使用默認賬戶登錄並修改root密碼

$mysql -u debian-sys-maint -p
Enter password:

mysql> use mysql;
mysql> update user set authentication_string=PASSWORD('密碼') and plugin='mysql_native_password' where User='root';  # 注意此處PASSWORD() 函數不可少
mysql> flush privileges;
mysql> exit;

$ sudo service mysql restart  # 重啓mysql服務

Step 3. 使用root登錄

$ mysql -u root -p
Enter password:

mysql>