sudo apt-get install vim g++ codelite cmake
sudo apt-get install -y codelite-plugins
git filter-branch -f --index-filter
git filter-branch -f --index-filter 'git rm --cached --ignore-unmatch io/cached_io_write_file/direct_io.data'
https://zhuanlan.zhihu.com/p/98360630 https://github.com/spf13/spf13-vim https://www.zhihu.com/question/19989337 https://vimjc.com/vim-commands-and-vim-mapping-conf.html
https://www.cs.colby.edu/maxwell/courses/tutorials/maketutor/
io code
kernel code