dir:
---
o bash
    -> doc

o bsp
    -> doc

o cisco
    -> ccna

o skseye
    -> doc 
    -> src

o simics
    -> doc


git user steps: 
--------------
  webpage: www.github.com
  user: oscenter
  pwd:  oscenter

1. install git:
  $ sudo aptitude install git-core

2.setup git:
  $ git config --global user.name "Your Name"
  $ git config --global user.email oscenter.lei@gmail.com

3.setup ssh key:
  $ cd ~/.ssh
  $ ssh-keygen -t rsa -C "oscenter.lei@gmail.com"       

4.install xclip:
  $ sudo apt-get install xclip
  $ cat ~/.ssh/id_rsa.pub | xclip -sel clip

5.add webpage id_key:

6.test ssh git server:
  $ ssh git@github.com

7.git user steps[NEW]:
  $ mkdir th
  $ cd th
  $ git init
  $ touch README
  $ git add README
  $ git commit -m 'first commit'
  $ git remote add origin git@github.com:oscenter/th.git
  $ git push origin master

7.Existing Git Repo?
  $ cd existing_git_repo
  $ git remote add origin git@github.com:oscenter/th.git
  $ git push origin master