Saya memasang MySQL sebelum ini dan kemudian rakan sekelas tersilap memadam fail soket .sock Selepas itu, saya melaraskan pelbagai kebenaran dan berjaya memulihkan MySQL untuk berjalan, tetapi masalah itu datang, tidak kira apa arahan yang dimasukkan, ERROR 1045 (28000) dipaparkan . : Akses ditolak untuk pengguna 'langdan'@'localhost' (menggunakan kata laluan: NO)，
Maka log ralat berwarna ungu
2017-07-03T09:08:31.486912Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-07-03T09:08:31.487319Z 0 [Note] --secure-file-priv is set to NULL. Operations related to importing and exporting data are disabled
2017-07-03T09:08:31.487395Z 0 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.7.18) starting as process 87271 ...
2017-07-03T09:08:31.492488Z 0 [Warning] Setting lower_case_table_names=2 because file system for /usr/local/mysql/data/ is case insensitive
2017-07-03T09:08:31.681427Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-07-03T09:08:31.681473Z 0 [Note] InnoDB: Uses event mutexes
2017-07-03T09:08:31.681482Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2017-07-03T09:08:31.681492Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.3
2017-07-03T09:08:31.682043Z 0 [Note] InnoDB: Number of pools: 1
2017-07-03T09:08:31.682213Z 0 [Note] InnoDB: Using CPU crc32 instructions
2017-07-03T09:08:31.812247Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2017-07-03T09:08:31.831267Z 0 [Note] InnoDB: Completed initialization of buffer pool
2017-07-03T09:08:31.902871Z 0 [Note] InnoDB: Highest supported file format is Barracuda.
2017-07-03T09:08:31.923340Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2017-07-03T09:08:31.962321Z 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2017-07-03T09:08:32.631348Z 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
2017-07-03T09:08:32.633295Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active.
2017-07-03T09:08:32.633338Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active.
2017-07-03T09:08:32.633751Z 0 [Note] InnoDB: Waiting for purge to start
2017-07-03T09:08:32.685043Z 0 [Note] InnoDB: 5.7.18 started; log sequence number 2576361
2017-07-03T09:08:32.685414Z 0 [Note] InnoDB: Loading buffer pool(s) from /usr/local/mysql-5.7.18-macos10.12-x86_64/data/ib_buffer_pool
2017-07-03T09:08:32.685622Z 0 [Note] Plugin 'FEDERATED' is disabled.
2017-07-03T09:08:32.686293Z 0 [Note] InnoDB: Buffer pool(s) load completed at 170703 17:08:32
2017-07-03T09:08:32.695242Z 0 [Warning] Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key
2017-07-03T09:08:32.702677Z 0 [Note] Server hostname (bind-address): '*'; port: 3306
2017-07-03T09:08:32.702967Z 0 [Note] IPv6 is available.
2017-07-03T09:08:32.703064Z 0 [Note] - '::' resolves to '::';
2017-07-03T09:08:32.703210Z 0 [Note] Server socket created on IP: '::'.
2017-07-03T09:08:37.215832Z 0 [Note] Event Scheduler: Loaded 0 events
2017-07-03T09:08:37.216076Z 0 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
Version: '5.7.18' socket: '/tmp/mysql.sock' port: 3306 MySQL Community Server (GPL)
2017-07-03T09:08:37.216100Z 0 [Note] Executing 'SELECT * FROM INFORMATION_SCHEMA.TABLES;' to get a list of tables using the deprecated partition engine. You may use the startup option '--disable-partition-engine-check' to skip this check.
2017-07-03T09:08:37.216108Z 0 [Note] Beginning of list of non-natively partitioned tables
2017-07-03T09:08:40.456702Z 0 [Note] End of list of non-natively partitioned tables
2017-07-03T09:08:40.495603Z 4 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:08:40.499672Z 3 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:08:41.989306Z 5 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:08:43.985722Z 6 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:08:46.096607Z 7 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:08:48.291440Z 8 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:08:50.218176Z 9 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:08:51.982287Z 10 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:08:54.586154Z 11 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:08:56.193629Z 12 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:08:57.986180Z 13 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:09:00.083261Z 14 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:09:02.263890Z 15 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:09:04.464658Z 16 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:09:06.655734Z 17 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:09:08.846245Z 18 [Note] Access denied for user 'langdan'@'localhost' (using password: NO)
2017-07-03T09:09:11.027710Z 
![[Web front-end] Permulaan pantas Node.js](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
1. Adakah kata laluan itu betul 2. Adakah IP terhad akses digunakan?