mysql
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

mysql -h localhost
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)


mysql -h 127.0.0.1
ERROR 1045 (28000): Access denied for user 'xxx'@'localhost' (using password: NO)


使用 mysql -h 127.0.0.1  可以连接 


本地连接使用 socket文件方式， socket文件在 /etc/mysql.cnf 里配置 
找不到 socket 文件则报错

检查 MySQL 服务状态 
service mysqld status
SUCCESS! MySQL running (49903)

确定 socket 文件 路径

lsof -c mysqld |grep sock
/data01/mysql/mysql5.7/log/mysql.sock

或者 
lsof -c mysqld |grep sock
find / -name '*.sock'

解决方案 

/etc/my.cnf
把client和mysqld的socket 文件配置成一样 即可




查看文件信息
file /tmp/mysql.sock
stat /tmp/mysql.sock


mysql -u root -p

show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
set password="YOUR_PASSWORD";