Ruby on Rails

Colin Law wrote in post #1171411:
> I believe you asked this question once before. What do you think in
> your code the td with image_tag user.avatar.url does? (see now why not
> to use a jpg, I have had to go and look at the image and re-type it
> rather than copying). Look at the html in the browser and see what it
> is.
>
> Colin

Yea i did but unable to find anything Googling so trying my self.
yea i know image_tag user.avatar.url gives me the url of file uploaded.
but can you tell me or point me towards some direction in rails 4 how
would i generate links for my uploaded files.

and one more thing when i upload images whether jpg or png it gives e
paperclip not identified error and i have dont everything uninstalling
and installing again imagemagick and also put
Paperclip.options[:command_path] = "/usr/local/bin/"
in development.rb
but still error

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