Code!

git add .  (adds all files to commit)

git commit -m "useful message describing what you did"

git push origin master

Or use 

git commit -a -m 'added new benchmarks'

Instead of <a> tags use:

<%= link_to "Text_for_link", "URL" %>

Example of internal link:

<%= link_to "Home", "/" %>  this is to root page <%= link_to "About", "/about" %>

Example of external link:

In routes.rb, change 

get 'controller/action'

get 'pages/about'

to

get "url_ending_you_want" => 'pages#about'

for example:

In routes.rb use:

root to: 'controller#action_name' 

root to: 'controller#page'

for example:

You can use:

rails generate controller [Name] [action action, etc] 

For example:

Use 

rvm install [version you want]

for example:

Use 

rails new project_name

You don't need to make a new directory/folder beforehand because this command will create one with the same name as your project. But if you do have a folder already that you want to use, then just make your project the same name and rails will recognize it exists already.

Btw, you can make a new directory/folder with

mkdir directory_name

Or if you need to specify a place within other folders: