How to install NERDTree for vim? | How to always display a file explorer at the left side in vim?

https://github.com/preservim/nerdtree#readme

How to install NERDTree?

Pathogen

Pathogen is more of a runtime path manager than a plugin manager. You must clone the plugins' repositories yourself to a specific location, and Pathogen makes sure they are available in Vim.

1. In the terminal,

   git clone https://github.com/preservim/nerdtree.git ~/.vim/bundle/nerdtree
2. In your vimrc,

   call pathogen#infect()
   syntax on
   filetype plugin indent on
3. Restart Vim, and run :helptags ~/.vim/bundle/nerdtree/doc/ or :Helptags.

 How to display file explorer in vim?

 :NERDTree