在mac上安装了mysql后进行登录，总是报ERROR 2002 (HY000)的错误，网上搜索说要先删除/tmp/mysql.sock文件。后来发现/tmp目录下并没有mysql.sock文件，于是启动mysql服务，问题解决！
cd /usr/local/mysql/ sudo ./support-files/mysql.server start
详细可参考此链接：https://blog.****.net/cryhelyxx/article/details/43015911
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