Ever want to run some shell commands while doing a vi edit
session? Like, "what's the name of that file" I want to use in
this script I'm making?
Instead of exiting vi; doing the ls filenamepart*, and going
back into vi, you can from a vi session:
enter ":", then enter "shell".
This suspends the vi session and gives you a command prompt
where you can use any shell command. When finished, enter the
"exit" command and you will be returned to the vi session.
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