no such file to load -- readline
可能是缺少两个包

sudo apt-get install libncurses5-devsudo apt-get install libreadline5-dev

cd .rvm/src/ruby-1.9.2-p180/ext/readline   #  反正就是在ruby的 ext/redline 目录下ruby extconf.rbmakesudo make install

rvm remove 1.9.2rvm install 1.9.2