Mac OS下在Dropbox中建立软连接
背景
需要同步到Dropbox的内容都得放置在一个文件夹里面，默认名字叫"Dropbox"。
问题
实际情况是：许多文档，代码等已经放置在其他相关的文件夹里面了。如果搬到"Dropbox"文件夹中，会给管理带来麻烦。如果不搬到“Dropbox”中，怎么样让Dropbox也能够自动的及时更新这些备份呢？
解决：
要用到软连接： ln -s 实际所在的路径及名字 希望所在的路径及名字 。具体命令如下（需要把 xxx替换成自己的用户名）：
ln -s /Users/yuanbo/Work\ and\ Study/R_learning/R\ Working\ Directory/yuan_blogdown/mywebsite/docs /Users/yuanbo/Dropbox/应用/updog/yuanbo
Yuan Bo 袁博
Associate Professor of Psychology (Social Psychology)
My research examines the nature and dynamics of social norms, namely how norms may emerge and become stable, why norms may suddenly change, how is it possible that inefficient or unpopular norms survive, and what motivates people to obey norms. I combines laboratory and simulation experiments to test theoretical predictions and build empirically-grounded models of social norms and their dynamics.