updated
How to reinstall Octopress with Octostrap3 theme on Debian
Reinstall Octopress
cd [path-to-repos]
git clone git@github.com:[your-github-pages-repo.git] octopress
cd octopress
git checkout source
rake setup_github_pagesRe-enable theme submodule
git submodule init
git submodule update
cd .themes/octostrap3
git checkout master