reference：http://www.jb51.net/article/87160.htm?pc
1.ERROR 2002 (HY000): Can‘t connect to local MySQL server through socket ‘/usr/local/mysql/mysql.sock‘ (2)
more /etc/my.cnf |grep sock #显示sock的目录
在mysql目录下并没有找到mysql.sock，默认在/tmp目录下，所以修改/etc/my.cnf
socket = /tmp/mysql.sock #修改/添加该行
2.mysql: [ERROR] unknown variable ‘character-set-server=utf8‘
“character-set-server=utf8” 语句改为：
default-character-set=utf8
loose-default-character-set=utf8
problems when installed mysql in linux ubuntu
原文：http://www.cnblogs.com/zhang-qc/p/6501016.html