Homebrew - Correcting warning after running Brew Doctor - Altering Path (/user/bin) issue

Question

Context

• I'm getting this error, when running the Brew Doctor command in the terminal after installing homebrew(https://github.com/mxcl/homebrew):

  

• To fix this issue I'm following the instructions here : How to modify PATH for Homebrew?

• When I type in sudo vi /etc/paths to the terminal (I'm on the root), which by the way is part of the answer given in the StackOverflow question I reference above, I get this:

• When I quit the terminal and type in Brew Docotor I still get the same warning.

Questions

• Main Question: What am I doing wrong?
• Ancillary Question: Why in the terminal do I not have the ability to type anything after running the command?
• Ancillary Question: Why is there all this white space and the ~ characters after running the command?

Answer 1

Running this command:

echo 'export PATH="/usr/local/bin:/usr/local/sbin:~/bin:$PATH"' >> ~/.bash_profile

fixed the issue for me. I found it at this website: http://www.moncefbelyamani.com/how-to-install-xcode-homebrew-git-rvm-ruby-on-mac/ via How to modify PATH for Homebrew?