Why Vim? 

Knowing how to use Vim is an essential skill of any programmer. No matter what you use as your IDE, you will eventually be on a server and have to change something and the only editor available will be Vim. Once you start using Vim, you will soon realize that once you know the basic commands and set up Vim the way you like, you can write code faster than most other editors.

So get use to it!

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Vim Tutor

Knowing In the terminal just type in the command:
vimtutor

Command mode vs Insert mode

Command mode is where you start in Vim.
Insert mode is where you insert text

• esc → to get back to command mode

• i → to get to insert mode from command mode