How can I go back to the editing file after invoking shell in Ex mode?

Question

I run into a problem while practicing the Ex mode by running sh command, following this tutorial. I cannot go back to the editing file[s].

1. I can see the .swp dot file by running ls -a.
2. None listed by running jobs
3. fg can neither call it back.

I cannot find a relavant question here, except this one, but absolutely it cannot tackle this problem. Please point me in the right direction.

Answer 1

Type exit at the prompt and press Enter to terminate the current shell session and come back to Vim and your previous session.

$ jobs and $ fg don't work because you don't have background jobs in the current shell session. Those commands would work if you used <C-z> instead of :sh, though.

:sh suspends the current shell session and starts a new one in which you can't access processes running or suspended in the previous one. The only way to get back the previous session is to terminate the current one.

<C-z> only suspends Vim. This puts you back in the shell where you started Vim and where you can see Vim with $ jobs and switch back to it with $ fg.

Answer 2

I've found that typing Ctrl+C would go back to command input and then typing visual should bring you back to normal editing the document.