mysql错误ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'MAC'解决办法
MariaDB [(none)]> create database MAC; ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'MAC' MariaDB [(none)]> 方法一: 1.关闭mysql # service mysqld stop 【 备注centos7是systemctl stop mariadb】 2.屏蔽权限 # mysqld_safe --skip-grant-table 屏幕出现: Starting demo from ..... 3.新开起一个终端输入 #mysql -uroot -pxxxxxx MariaDB [(none)]> use mysql; MariaDB [mysql]> MariaDB [mysql]> UPDATE user SET Password=PASSWORD('newpassword') where USER='root'; 【备注:下一次会用newpassword密码登录数据库】 MariaDB [mysql]> FLUSH PRIVILEGES;//记得要这句话,否则如果关闭先前的终端,又会出现原来的错误 MariaDB [mysql]> \q ---------------------------------------------------------------------------- 我的实操测试 [root@nessus ~]# systemctl stop mysqld Failed to stop mysqld.service: Unit mysqld.service not loaded. [root@nessus ~]# systemctl stop mariadb [root@nessus ~]# [root@nessus ~]# [root@nessus ~]# mysqld_safe --skip-grant-table 191030 11:11:24 mysqld_safe Logging to '/var/log/mariadb/mariadb.log'. 191030 11:11:24 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 新开起一个终端输入 [root@nessus ~]# mysql -uroot 【我的无密码】 MariaDB [(none)]> use mysql; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed MariaDB [mysql]> UPDATE user SET Password=PASSWORD('newpassword') where USER='root'; Query OK, 4 rows affected (0.01 sec) Rows matched: 4 Changed: 4 Warnings: 0 MariaDB [mysql]> MariaDB [mysql]> MariaDB [mysql]> FLUSH PRIVILEGES; Query OK, 0 rows affected (0.00 sec) MariaDB [mysql]> \q Bye [root@nessus ~]# mysql -uroot 【发现之前无密码无法登陆了】 ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) [root@nessus ~]# [root@nessus ~]# mysql -uroot -pnewpassword 【得用newpassword密码登录数据库】 Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 5 Server version: 5.5.60-MariaDB MariaDB Server Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> MariaDB [(none)]> MariaDB [(none)]> MariaDB [(none)]> create database MAC; Query OK, 1 row affected (0.00 sec) MariaDB [(none)]> MariaDB [(none)]> MariaDB [(none)]> MariaDB [(none)]>
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