Enter command edit
> edit hello.txt<Enter>
| # text editor is now open
add some text
> edit hello.txt<Enter>
Hello world<Enter>
<Enter> # that second enter exits text editor and saves file
verify text is in there
> show hello.txt<Enter>
Hello world
>
add more text
> edit hello.txt<Enter>
Hello world # contents of the file are displayed
| # text editor is open to append more text
type in some text
> edit hello.txt<Enter>
Hello world # contents of the file are displayed
Goodbye cruel world<Enter> # adding more text
<Enter>
> show hello.txt<Enter>
Hello world
Goodbye cruel world
>