1. Q: seems better turn off vim udf ,backup, and swap file?

    A: seems not necessarily

  2. Q: error msgs 

    https://github.com/mojombo/jekyll/issues/810#issuecomment-13677293
    ping@640g-laptop:~/jekyll-site/pinggit.github.com$ jekyll --no-auto
 Configuration from /home/ping/jekyll-site/pinggit.github.com/_config.yml
 Building site: /home/ping/jekyll-site/pinggit.github.com -> /home/ping/jekyll-site/pinggit.github.com/_site
 /usr/lib/ruby/1.9.1/psych.rb:154:in `parse': (<unknown>): couldn't parse YAML at line 2 column 12 (Psych::SyntaxError)
         from /usr/lib/ruby/1.9.1/psych.rb:154:in `parse_stream'
         from /usr/lib/ruby/1.9.1/psych.rb:125:in `parse'
         from /usr/lib/ruby/1.9.1/psych.rb:112:in `load'
         from /var/lib/gems/1.9.1/gems/jekyll-0.12.0/lib/jekyll/convertible.rb:33:in `read_yaml'
         from /var/lib/gems/1.9.1/gems/jekyll-0.12.0/lib/jekyll/page.rb:24:in `initialize'
         from /var/lib/gems/1.9.1/gems/jekyll-0.12.0/lib/jekyll/site.rb:143:in `new'
         from /var/lib/gems/1.9.1/gems/jekyll-0.12.0/lib/jekyll/site.rb:143:in `block in read_directories'
         from /var/lib/gems/1.9.1/gems/jekyll-0.12.0/lib/jekyll/site.rb:133:in `each'
         from /var/lib/gems/1.9.1/gems/jekyll-0.12.0/lib/jekyll/site.rb:133:in `read_directories'
         from /var/lib/gems/1.9.1/gems/jekyll-0.12.0/lib/jekyll/site.rb:101:in `read'
         from /var/lib/gems/1.9.1/gems/jekyll-0.12.0/lib/jekyll/site.rb:39:in `process'
         from /var/lib/gems/1.9.1/gems/jekyll-0.12.0/bin/jekyll:264:in `<top (required)>'
         from /usr/local/bin/jekyll:19:in `load'
         from /usr/local/bin/jekyll:19:in `<main>'

    A: be cautious not to make any mistake of YAML in ANY files!

    ---
layout: page
title: site -- Try!
tagline: tips: life, tech, thought
---

    should be:

    ---
layout: page
title: site -- Try!
tagline: tips of life, tech, thought
---

  3. git

    must execute under root , otherwise not submit/push parent folder files!!