title: Homebrew: Won't link git on Mountain Lion
body: <p>Have installed Homebrew and have downloaded git, but it won't link. Get this error message:</p>
  
  <pre><code>Consider amending your PATH so that /usr/local/bin
  occurs before /usr/bin in your PATH.
  Warning: You have a non-Homebrew 'pkg-config' in your PATH:
    /opt/sm/pkg/active/bin/pkg-config
  
  `./configure` may have problems finding brew-installed packages using
  this other pkg-config.
  unknown7cd1c3e98b07:~ pdenlinger$ brew install git
  Error: git-1.8.0 already installed, it's just not linked
  unknown7cd1c3e98b07:~ pdenlinger$ brew link git
  Linking /usr/local/Cellar/git/1.8.0... Warning: Could not link git. Unlinking...
  
  Error: Could not symlink file: /usr/local/Cellar/git/1.8.0/bin/gitk
  Target /usr/local/bin/gitk already exists. You may need to delete it.
  To force the link and delete this file, do:
    brew link --overwrite formula_name
  
  To list all files that would be deleted:
    brew link --overwrite --dry-run formula_name
  unknown7cd1c3e98b07:~ pdenlinger$ brew link git
  </code></pre>
  
  <p>What can I do to fix this?</p>
  
  <p>Response from vi command:</p>
  
  <pre><code>sudo vi /etc/paths     /usr/local/bin  /usr/local/sbin   /usr/bin   /bin   /usr/sbin   /sbin
  7 files to edit
  
  
  E325: ATTENTION
  Found a swap file by the name "/etc/.paths.swp"
            owned by: root   dated: Thu Nov 22 09:10:09 2012
           file name: /private/etc/paths
            modified: no
           user name: root   host name: unknown7cd1c3e98b07.att.net
          process ID: 98069 (still running)
  While opening file "/etc/paths"
               dated: Tue Aug 21 15:44:10 2012
  
  (1) Another program may be editing the same file.
      If this is the case, be careful not to end up with two
      different instances of the same file when making changes.
      Quit, or continue with caution.
  
  (2) An edit session for this file crashed.
      If this is the case, use ":recover" or "vim -r /etc/paths"
      to recover the changes (see ":help recovery").
      If you did this already, delete the swap file "/etc/.paths.swp"
      to avoid this message.
  
  Swap file "/etc/.paths.swp" already exists!
  [O]pen Read-Only, (E)dit anyway, (R)ecover, (Q)uit, (A)bort:
  </code></pre>