mysqldump: Got error: 2002: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) when trying to connect

1. 问题描述

在对MySQL数据库备份时，执行mysqldump命令，报错

mysqldump: Got error: 2002: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) when trying to connect

2. 问题原因

上述报错已指明是因为mysql的socket文件读取异常（文件可能已删除），导致socket无法连接所致

2.1 确认当前MySQL的socket

netstat -ln | grep mysql

或者查看 /etc/my.cnf 文件

3. 解决方法

3.1 添加正确的socket地址

--socket=/data/mysql/mysql.sock

3.2 再次执行mysqdump命令

mysqldump -uroot -p123456 --socket=/data/mysql/mysql.sock --databases database1 > /data/db.sql