How to number the ls output in unix?

Question

I am trying to write a file with format - "id file_absolute_path" which basically lists down all the files recursively in a folder and give an identifier to each file listed like 1,2,3,4.

I can get the absolute path of the files recursively using the following command:

ls -d -1 $PWD/**/*/*

However, I am unable to give an identifier from the output of the ls command. I am sure this can be done using awk, but can't seem to solve it.

Answer 1

Pipe the output through cat -n.

Answer 2

Assuming x is your command:

x | awk '{print NR, $0}'

will number the output lines

Answer 3

Two posible commands:

ls -d -1 $PWD/**/*/* | cat -n
ls -d -1 $PWD/**/*/* | nl

nl puts numbers to file lines.

I hope this clarifies too.