How to rename a group of files?

Question

linux

Good day to all.
Actually a subject.
I have an array of files that looks something like this:

66379 file PIR.pdf
66655 file PIR (2).pdf
66655 file PIR.pdf

It needs to be brought into view:

file 66379 PIR.pdf
file 66655 PIR (2).pdf
file 66655 PIR.pdf

Can you tell me the easiest way to do this?

Answer 1

rename 's/(\d+)\s+(.*?)\s+(PIR.*)/$2 $1 $3/' *.pdf

Answer 2

bash sed awk?