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
This error can also occur if you try to change the directory where the database is stored, but imput the wrong directory in the configuration file (like a typo in the second drive as D instead of the accurate D_). Instead of telling you the typo directory does not exist, it will tell you that you lack permission to access it (leading you to try to change the permissions for the typo directory, which it will let you do). So if you get this error while changing directories, double check the configuration file and make sure you don't have a typo.
其他回答
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
在我的例子中，问题是我所有数据库的页面损坏(检查mysql错误日志)。
我用强制恢复InnoDB解决了这个问题。诀窍是编辑/etc/mysql/my.cnf并添加
innodb_force_recovery = 4
略低于
[mysqld]
然后重新启动mysql。 在检查一切工作正常后，再把线移回来。
我曾经遇到过这个问题，并通过安装mysql-server解决了它，所以请确保您已经安装了mysql-server，而不是mysql-client或其他东西。
这个错误意味着文件/var/run/mysqld/mysqld.Sock不存在，如果你没有安装mysql-server，那么这个文件就不存在。在这种情况下，安装它
sudo apt-get install mysql-server
但是如果mysql-server已经安装并且正在运行，那么您需要检查配置文件。
配置文件如下:
/etc/my.cnf
/etc/mysql/my.cnf
/var/lib/mysql/my.cnf
在/etc/my.cnf目录下，套接字文件配置可能是/tmp/mysql。在/etc/mysql/my.cnf中，套接字文件配置可能是/var/run/mysqld/mysqld.sock。因此，删除或重命名/etc/mysql/my.cnf，让mysql使用/etc/my.cnf，那么问题就可以解决了。
检查你是否拥有正确的权限:
sudo chmod 755 /var/lib/mysql/mysql
我也有同样的问题，这个方法对我很有效。这样做之后，我就可以启动MySQL了。
sudo touch /var/lib/mysql/.force_upgrade
sudo rcmysql restart
当我有这个问题的时候
