nvim

sudo add-apt-repository ppa:jonathonf/vim
sudo add-apt-repository ppa:neovim-ppa/unstable
sudo apt-get update
sudo apt-get install neovim vim

Transitioning from Vim nvim-from-vim
$ mkdir -p /.config/nvim
Next, create and save a ~/.config/nvim/init.vim file with the following contents:
init.vim
set runtimepath^=/.vim runtimepath+=~/.vim/after
let &packpath = &runtimepath
source ~/.vim/vimrc

1. To start the transition, create your |init.vim| (user config) file:

    :call mkdir(stdpath('config'), 'p')
    :exe 'edit '.stdpath('config').'/init.vim'

2. Add these contents to the file:

    set runtimepath^=~/.vim runtimepath+=~/.vim/after
    let &packpath = &runtimepath
    source ~/.vimrc

3. Restart Nvim, your existing Vim config will be loaded.