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MySQL忘記密碼，或：root密碼重置報錯：mysqladmin: connect to server at ‘localhost‘ failed的解決方案

MySQL root密碼重置報錯：mysqladmin: connect to server at ‘localhost‘ failed的解決方案 1 登陸失敗,mysqladmin修改密碼失敗 [root@mysql var]# mysqladmin -u root password ‘123456‘ mysqladmin: connect to server at ‘localhost‘ failed error: ‘Access denied for user ‘root‘@‘localhost‘ (using password: NO)‘ 2 停止mysql服務 [root@mysql var]# /etc/init.d/mysqld stop Shutting down MySQL.... SUCCESS! 3 安全模式啟動 [root@mysql var]# mysqld_safe --skip-grant-tables & （路徑不一樣：/opt/mysql/product/5.5.25a/bin/mysqld_safe --skip-grant-tables &） [1] 10912 [root@mysql var]# 110407 17:39:28 mysqld_safe Logging to ‘/usr/local/mysql/var//mysql.chinascopefinanical.com.err‘. 110407 17:39:29 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/var/ 4 無密碼root帳號登陸 [root@mysql var]# /usr/bin/mysql -u root -p 【註釋，在下面的要求你輸入密碼的時候，你不用管，直接回車鍵一敲就過去了】 Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 48 Server version: 5.1.41-log Source distribution Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql> use mysql; Database changed 5 手動update修改密碼 mysql> update mysql.user set authentication_string=password("123456") where user=‘root‘ and host=‘localhost‘; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql> quit Bye [root@mysql var]# mysql -u root -p guNNhtqhjUnfky6ahyVh Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 172 Server version: 5.1.41-log Source distribution Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql> quit Bye 6 正常重新啟動 [root@mysql var]# service mysqld restart Shutting down MySQL..110407 17:45:29 mysqld_safe mysqld from pid file /usr/local/mysql/var//mysql.chinascopefinanical.com.pid ended SUCCESS! Starting MySQL.. SUCCESS! 分類: MySQL

修改初始密碼，轉載