【error】: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)'

错误描述如下：

error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)'

出现此问题一般是mysqlserver服务没有启动的缘故，当然导致没有启动的原因有很多，比如我在树莓派上遇到的就是内存不足，怎么 都无法启动服务。

1. 查看mysql服务是否进行：ps -aux | grep mysqld

2. 如果在运行的话就杀掉进程 sudo kill [pid]

3. 重启服务：

   sudo service mysql start

或：

sudo service mysqld start

注意：其他解决方法参考Reference

Reference

• http://stackoverflow.com/questions/11990708/error-cant-connect-to-local-mysql-server-through-socket-var-run-mysqld-mysq
• http://stackoverflow.com/questions/11657829/error-2002-hy000-cant-connect-to-local-mysql-server-through-socket-var-run
• http://stackoverflow.com/questions/19658891/error-2002-hy000-cant-connect-to-local-mysql-server-through-socket-var-run
• http://ubuntuforums.org/showthread.php?t=804021&page=1