Files

Count a word in a file

$ grep -c '\<word\>' file.csv

Markdown

Compile Markdown to HTML

$ npm install -g marker
$ marker -i file.md -o file.html --gfm

Network

IP address for the first network service associated with the given interface (en0 in the example)

$ ipconfig getifaddr en0

Recipe for a new js module

$ git clone git@github.com:riccardoscalco/outset-js-module.git my-new-module
$ cd my-new-repo
$ rm -rf .git

Create a repo on Github
$ git init
$ git ..

$ npm install xo
Edit...
$ npm publish

Git

Undo commits permanently

$ git commit ...
$ git reset --hard HEAD~3

The last three commits (HEAD, HEAD^, and HEAD~2) were bad and you do not want to ever see them again. Do not do this if you have already given these commits to somebody else.