github上的原文：sed command with -i option failing on Mac, but works on Linux

不是最佳方案，但比较好，-i''可以直接覆盖，不用创建备份。

This works with both GNU and BSD versions of sed:

sed -i'' -e 's/old_link/new_link/g' *

or with backup:

sed -i'.bak' -e 's/old_link/new_link/g' *