>which vim
/usr/bin/vim
>ls -la ~/.vimrc
-rwxrwxrwx. 1 username ...

1: /etc/vimrc
 2: /usr/share/vim/vim72/syntax/syntax.vim
 3: /usr/share/vim/vim72/syntax/synload.vim
 4: /usr/share/vim/vim72/syntax/syncolor.vim
 5: /usr/share/vim/vim72/filetype.vim
 6: /usr/share/vim/vim72/ftplugin.vim
 7: /usr/share/vim/vim72/indent.vim
 8: /usr/share/vim/vim72/syntax/nosyntax.vim
 9: /usr/share/vim/vim72/plugin/filetype.vim
 10: /usr/share/vim/vim72/plugin/getscriptPlugin.vim
 11: /usr/share/vim/vim72/plugin/gzip.vim
 12: /usr/share/vim/vim72/plugin/matchparen.vim
 13: /usr/share/vim/vim72/plugin/netrwPlugin.vim
 14: /usr/share/vim/vim72/plugin/rrhelper.vim
 15: /usr/share/vim/vim72/plugin/spellfile.vim
 16: /usr/share/vim/vim72/plugin/tarPlugin.vim
 17: /usr/share/vim/vim72/plugin/tohtml.vim
 18: /usr/share/vim/vim72/plugin/vimballPlugin.vim
 19: /usr/share/vim/vim72/plugin/zipPlugin.vim

"refreshes for any vimrc updates
map <C-r> :source ~/.vimrc<CR>

"opens vimrc
map <C-o> :e ~/.vimrc<CR>

:source ~/.vimrc

$ vim

:help initialization