安装mysql-server解决了这个问题

sudo apt-get install mysql-server

我也有同样的问题。我找到了这个。

ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’

这是因为在启动MySQL客户端之前没有运行mysqld守护进程。文件/var/lib/mysql/mysql.在运行MySQL的第一个实例时，将自动创建sock。

修复:

首先启动MySQL守护进程，然后输入MySQL:

/etc/init.d/mysqld start
mysql

修改MySQL Root密码

默认情况下，MySQL数据库的root密码为空。从安全角度考虑，将MySQL根密码更改为新密码是一个好主意。

mysql> USE mysql;
mysql> UPDATE user SET Password=PASSWORD('newpassword') WHERE user='root';
mysql> FLUSH PRIVILEGES;

完成后，通过登录进行检查:

mysql -u root -p
Enter Password: <your new password>

我在mariadb的termux中遇到了这个问题，它解决了我的问题是以下两行命令-

Pkill MySQL

Mysqld_safe -u root

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.

适用于CentOS Linux发行版7.3 mysql。Sock文件路径为/var/lib/mysql/mysql.sock

编辑/etc/my.cnf文件并放入下面的条目 这将解决你的问题。

[client]
user=root
password=Passw0rd
port=3306
socket=/var/lib/mysql/mysql.sock
[mysqld]
bind-address=0.0.0.0

在此之后重新启动服务

service mysql restart

似乎你的MYSQL停止了。使用下面的命令重新启动MySQL

sudo service mysql start