Krdytkyu

Is there a way to access the terminal while using Vim?

I do not like to open another terminal or save and exit the current terminal.

You can send vim the SIGTSTP signal. You do this by pressing ctrl+z. Vim will get suspended in the background, and you can use the terminal. Type fg in the terminal to resume with vim.

Bonus tip: This works on nearly all terminal applications. Use bg to enable the application to continue running in the background.

In vim, just type:

:!sh

:! launches an external process -- in this case sh, another shell. Control will return to vim once you exit the shell. If you want to use the shell concurrently with vim, add & to the end of the sh command:

:!sh&

You can use the :shell command (or the short form :sh). From :help :shell:

This command starts a shell. When the shell exits (after the "exit" command) you return to Vim. The name for the shell command comes from 'shell' option.

By default, on Ubuntu, this will give you bash. type exit to return to vim when you're done.

As addition to all answers.

You can install ConqueTerm plugin

This plugin provide ability to run interactive programs inside vim buffers.

After installation you can add this 2 lines to your .vimrc:

:nnoremap <S-w> :q!<CR>

:nnoremap <S-t> :ConqueTermSplit bash<CR>

And you will be able to run bash by pressing Shift + T, and close current Conque tab by pressing Shift + W

It is perferct if you need fast open/close bash.

Here is gif that showing how it is look like

Since recent vim you can now do:

:terminal

This was initially added in Vim 8.0.693, but with lots of bugs. See :help terminal:

WARNING: THIS IS ONLY PARTLY IMPLEMENTED, ANYTHING CAN STILL CHANGE



The terminal feature is optional, use this to check if your Vim has it: 

        echo has('terminal')

If the result is "1" you have it.   



[...]



The terminal feature requires the +multi_byte, +job and +channel features.



==============================================================================

1. Basic use                                            terminal-use



This feature is for running a terminal emulator in a Vim window.  A job can be

started connected to the terminal emulator. For example, to run a shell: 

     :term bash



Or to run a debugger: 

     :term gdb vim



The job runs asynchronously from Vim, the window will be updated to show

output from the job, also  while editing in any other window.

Another option with either screen or byobu is to open a tab within those programs. These programs make it fairly easy to keep a terminal-session c.q. shell open and switch between those screens with the keyboard.