我在Ubuntu 12.04 LTS (Precise穿山甲)上安装了LAMP，然后在phpMyAdmin上设置根密码。我忘记密码了，现在无法登录。当我试图通过终端更改密码时，我得到:
错误2002 (HY000):无法通过套接字连接到本地MySQL服务器 ' / var /运行/ mysqld / mysqld。袜子”(2)
我该如何解决这个问题?我无法打开LAMP，卸载它或重新安装它。
当前回答
对我来说是:
打开/etc/mysql/my.cnf或/etc/my.cnf，搜索“bind-address”。结果是127.0.0.1。我将其转换为localhost，因此行结果应该是'bind-address = localhost'。
否则，你应该使用bind-address指令中存在的IP地址运行你的MySQL服务器，即MySQL -h 127.0.0.1。
其他回答
尝试重新启动服务器
sudo /usr/local/mysql/support-files/mysql.server start
如果出现任何错误，请按照以下步骤进行操作
mysqld
您将看到下面的日志。注意MySQL目录中突出显示的部分
mysqld: Can't change dir to '/usr/local/mysql-5.7.14-osx10.11-x86_64/data/' (Errcode: 13 - Permission denied) 2016-10-04T14:09:19.392581Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2016-10-04T14:09:19.392847Z 0 [Warning] Insecure configuration for --secure-file-priv: Current value does not restrict location of generated files. Consider setting it to a valid, non-empty path. 2016-10-04T14:09:19.392921Z 0 [Note] mysqld (mysqld 5.7.14) starting as process 1402 ... 2016-10-04T14:09:19.397569Z 0 [Warning] Can't create test file /usr/local/mysql-5.7.14-osx10.11-x86_64/data/Sudharshan.lower-test 2016-10-04T14:09:19.397597Z 0 [Warning] Can't create test file /usr/local/mysql-5.7.14-osx10.11-x86_64/data/Sudharshan.lower-test 2016-10-04T14:09:19.397712Z 0 [ERROR] failed to set datadir to /usr/local/mysql-5.7.14-osx10.11-x86_64/data/ 2016-10-04T14:09:19.397776Z 0 [ERROR] Aborting 2016-10-04T14:09:19.397795Z 0 [Note] Binlog end 2016-10-04T14:09:19.397925Z 0 [Note] mysqld: Shutdown complete
sudo chown -R _mysql:_mysql /usr/local/mysql-5.7.14-osx10.11-x86_64
注意前面日志中的MySQL文件夹路径/usr/local，在我的例子中，它是MySQL -5.7.14-osx10.11-x86_64，您必须根据您在计算机上获得的日志更新它，以提供对MySQL目录的读访问
sudo /usr/local/mysql/support-files / mysql。服务器启动
启动MySQL 成功!
将/opt/lampp/etc/my.cnf文件复制到/etc/mysql/my.cnf
在终端类型中:
mysql -u root
你会得到mysql>提示:
mysql> Update mysql.user set Password=PASSWORD('your_password') where user='root';
mysql> FLUSH PRIVILEGES;
在我的情况下，我的问题是，我试图从我的linux终端访问，而不是从我的docker容器与mysql。
在我的情况下，似乎我不能真正杀死mysql进程，当我运行
sudo service mysql stop
ps -ef | grep mysql
mysql进程一直在那里，看起来它阻塞了套接字文件，新的mysql进程不能自己创建它。
这很有帮助
cd /var/run
sudo cp mysqld/ mysqld.bc -rf
sudo chown mysql:mysql mysqld.bc/
sudo service mysql stop
sudo cp mysqld.bc/ mysqld -rf
sudo chown mysql:mysql mysqld -R
sudo /usr/sbin/mysqld --skip-grant-tables --skip-networking &
现在我能够登录数据库使用
mysql -u root
然后更新root密码:
UPDATE user SET authentication_string=password('YOURPASSWORDHERE') WHERE user='root';
FLUSH PRIVILEGES;
PS:我在更新根密码时遇到了麻烦，似乎是“auth_socket”插件的问题，所以我必须创建具有完整权限的新用户
insert into user set `Host` = "localhost", `User` = "super", `plugin` = "mysql_native_password", `authentication_string` = NULL, `password_expired` = "N", `password_lifetime` = NULL, `account_locked` = "N", `Select_priv` = "Y",
`Insert_priv` = "Y", `Update_priv` = "Y", `Delete_priv` = "Y", `Create_priv` = "Y", `Drop_priv` = "Y", `Reload_priv` = "Y", `Shutdown_priv` = "Y", `Process_priv` = "Y", `File_priv` = "Y",
`Grant_priv` = "Y", `References_priv` = "Y", `Index_priv` = "Y", `Alter_priv` = "Y", `Show_db_priv` = "Y", `Super_priv` = "Y", `Create_tmp_table_priv` = "Y", `Lock_tables_priv` = "Y",
`Execute_priv` = "Y", `Repl_slave_priv` = "Y", `Repl_client_priv` = "Y", `Create_view_priv` = "Y", `Show_view_priv` = "Y", `Create_routine_priv` = "Y", `Alter_routine_priv` = "Y",
`Create_user_priv` = "Y", `Event_priv` = "Y", `Trigger_priv` = "Y", `Create_tablespace_priv` = "Y";
这将创建一个没有密码的用户“super”，然后你可以连接mysql -u super
您缺少创建/var/run/mysqld目录的权限。所以请创建和 给予许可如下。
Mkdir -p /var/run/mysqld Chown mysql:mysql /var/run/mysqld
