metadata - How can I rename Image with modified date and overwrite filename with number count using Jhead Tool?

A quick question... (Edited)

Year/Month/Day-Filename-001.jpg

  jhead -n%Y%m%d [(name)] 001 .jpg

(Not sure which options lets me create a filename after the year/month/day option in the usage documentation)

If it matters, I'm using a Mac.

Answer

I want to overwriting more than one image and a number count “001”, “002” ect.

For the example you provided in a comment to tfb's answer, sequentializing the filenames breaks when you use the %f option. With multiple input files you'd get:

$ ls *.jpg
foo.jpg foo2.jpg
$ jhead -n"%Y_%m_%d-%f-newname001" *.jpg
 foo.jpg --> 2019_09_14-foo-newname001.jpg

 foo2.jpg --> 2019_09_14-foo2-newname001.jpg

But if you omit %f, and add %03i, you'll get the following:

$ ls *.jpg
foo.jpg foo2.jpg
$ jhead -n"%Y_%m_%d-newname-%03i" *.jpg
 foo.jpg --> 2019_09_14-newname-001.jpg
 foo2.jpg --> 2019_09_14-newname-002.jpg