Merge pull request #1302 from nd0104/master

申领20140709 How to set up two-factor authentication for SSH login on Linux
干的好，忽略了.bak不错。
PUB:20140624 How to sync Microsoft OneDrive on Linux

@geekpi
PUB:20140624 Top500 Supercomputer Remains Stuck at 33.86 Petaflops Each s - 翻译

@owen-carter
Merge pull request #1 from LCTT/master

Update personal repo