rails新环境

sudo apt-get install gcc build-essential g++ libssl-dev libreadline5-dev zlib1g-dev linux-headers-generic libxml2-dev libcurl4-openssl-dev curl git-core bison zlib1g subversion autoconf libpcre3-dev iptux mysql-server-5.1 libevent-dev openssh-server imagemagick libmysql-ruby libmysqlclient-dev libsqlite3-dev

参考了
http://www.cnblogs.com/lexus/archive/2011/05/30/2063049.html