How to add new line after bash command before output

Question

I have my prompt set to add a new line after any preceding output, but I would like to add a new line before the output as well (after commands), effectively surrounding my prompt with empty lines for readability.

Currently I have this:

{end of previous output}

[~/Documents/scripts]
>>> stroop: echo sample output
sample output

This is what I would like to accomplish:

{end of previous output}

[~/Documents/scripts]
>>> stroop: echo sample output

sample output

Is there a way to do this by modifying PS1 or otherwise?

Fabiano Francesconi · Accepted Answer · 2015-09-08 21:58:30Z

2

What about adding PROMPT_COMMAND=echo to your .bashrc? This will execute "echo" after each command.

Or you can use something like trap echo DEBUG to intercept the execution and strike that echo before each command.

This works for me:

bash-3.2$ cat .bashrc

trap echo DEBUG
bash-3.2$ cd foo/

bash-3.2$ ls

foo
bash-3.2$

edited Sep 8, 2015 at 21:58

answered Sep 8, 2015 at 21:45

Fabiano Francesconi

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5 Comments

stroop Over a year ago

I'm using .bash_profile to export my PS1 (on mac) and this didn't do anything. Does that make a difference?

Fabiano Francesconi Over a year ago

Try executing the command directly in your shell to see if it does something first

stroop Over a year ago

Oh, well I missed a letter. It adds an additional new line after the output, though. Not before.

stroop Over a year ago

trap echo debug works, but it does add about 7 new lines before my prompt when I first launch a terminal window.

rici Over a year ago

The DEBUG trap runs before every "simple command", so if your command is a pipe (grep pat file | wc), you'll get a blank line for each pipe component.

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