[SOLVED] executing find command with a file having directory list

Issue

I have a big file which contains directories paths like below:

$PRJ/fp/t/mxl/lf/
$PRJ/fp/t/mxl/lf/

I want to read this file line by line and list out all the files inside each directory file in a line in output file.

I can use find command with directory path directory specify but how to use it with a file having directory paths is something I want. find input_file -type f does not work.

Solution

while IFS= read -r dir; do
    find "$dir" -type f
done < <(envsubst < my_big_file)

See https://unix.stackexchange.com/a/294400/133219 and the man page for more info on envsubst.

Answered By - Ed Morton

Answer Checked By - Mary Flores (WPSolving Volunteer)