We can use :read (or :r) to append ouput of an external command.

Examples

#1

:r !ls *

Output:

README.md
common_headers.py
data
find_missing_values.py
pandas
seaborn

#2

:r !date

Output:

Sun Feb  9 06:05:42 CST 2020

#3

:r !pwd

Output:

/users/lolimay/code/unknown