How do I configure my vimrc to use different theme? - vim

Question

My vimrc is located at /usr/share/vim/vimrc and I have got .vim file for theme I want to use. In which directory I put my .vim theme file and what I change in my vimrc file?
Here is my vimrc file:
" All system-wide defaults are set in $VIMRUNTIME/debian.vim (usually just
" /usr/share/vim/vimcurrent/debian.vim) and sourced by the call to :runtime
" you can find below. If you wish to change any of those settings, you should
" do it in this file (/etc/vim/vimrc), since debian.vim will be overwritten
" everytime an upgrade of the vim packages is performed. It is recommended to
" make changes after sourcing debian.vim since it alters the value of the
" 'compatible' option.
" This line should not be removed as it ensures that various options are
" properly set to work with the Vim-related packages available in Debian.
runtime! debian.vim
" Uncomment the next line to make Vim more Vi-compatible
" NOTE: debian.vim sets 'nocompatible'. Setting 'compatible' changes numerous
" options, so any other options should be set AFTER setting 'compatible'.
"set compatible
" Vim5 and later versions support syntax highlighting. Uncommenting the next
" line enables syntax highlighting by default.
if has("syntax")
syntax on
endif
" If using a dark background within the editing area and syntax highlighting
" turn on this option as well
"set background=dark
" Uncomment the following to have Vim jump to the last position when
" reopening a file
"if has("autocmd")
" au BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g'\"" | endif
"endif
" Uncomment the following to have Vim load indentation rules and plugins
" according to the detected filetype.
"if has("autocmd")
" filetype plugin indent on
"endif
" The following are commented out as they cause vim to behave a lot
" differently from regular Vi. They are highly recommended though.
"set showcmd " Show (partial) command in status line.
"set showmatch " Show matching brackets.
"set ignorecase " Do case insensitive matching
"set smartcase " Do smart case matching
"set incsearch " Incremental search
"set autowrite " Automatically save before commands like :next and :make
"set hidden " Hide buffers when they are abandoned
"set mouse=a " Enable mouse usage (all modes)
set autoindent
" Source a global configuration file if available
if filereadable("/etc/vim/vimrc.local")
source /etc/vim/vimrc.local
endif

Answer 1

That file is not your vimrc: it is a default vimrc that is made available system-wide to make Vim behave in a slightly predictable way. Don't touch it.
The correct location for your vimrc is:
$HOME/.vimrc
and the correct location of your config (including colorschemes) is:
$HOME/.vim/
NEVER do anything in /usr/share/vim/: your changes won't work reliably or even predictably and they can be overwritten during an update.

Answer 2

See :help :colorscheme.
You can type :colo and then ctrl-d to list all available colorschemes.
Put your colorscheme in either $HOME/.vim/colors (Unix) or %USERPROFILE%\vimfiles\colors (Windows).
Example:
Put your colorscheme foo.vim into $HOME/.vim/colors and then colorscheme foo into your vimrc.

Answer 3

In Vim
:version
You will get:
System vimrc file: $VIM/vimrc
User vimrc file: $HOME/.vimrc
and run:
:scriptnames
you will get a list of path of your vimrc file:
1: /usr/share/vim/vimrc
2: /usr/share/vim/vim74/debian.vim
3: /usr/share/vim/vim74/syntax/syntax.vim
4: /usr/share/vim/vim74/syntax/synload.vim
5: /usr/share/vim/vim74/syntax/syncolor.vim
6: /usr/share/vim/vim74/filetype.vim
7: ~/.vimrc
8: /usr/share/vim/vim74/vimrc_example.vim
9: /usr/share/vim/vim74/syntax/nosyntax.vim
10: /usr/share/vim/vim74/ftplugin.vim
11: /usr/share/vim/vim74/indent.vim
12: /usr/share/vim/vim74/mswin.vi
...
So you may find that your vimrc file should be under ~/.vimrc. And like #romainl said never put your own file under /usr/share/vim, all changes may be overwritten during the update.