### `~/.vimrc`
```vim
set t_Co=256
colorscheme koehler

set nocompatible
syntax on
set showmode
set showcmd
set encoding=utf-8

set cindent
set expandtab
set tabstop=4
set softtabstop=4
set shiftwidth=4

set number
set cursorline
"set textwidth=80
set ruler

set showmatch
set hlsearch
set incsearch
set ignorecase
```