Renaming a set of files to 001, 002, … on Linux

Question

I originally had a set of images of the form image_001.jpg, image_002.jpg, ...

I went through them and removed several. Now I\'d like to rename the leftover files ba

Answer 1

This does the reverse of what you are asking (taking files of the form *.jpg.001 and converting them to *.001.jpg), but can easily be modified for your purpose:

for file in * 

do

if [[ "$file" =~ "(.*)\.([[:alpha:]]+)\.([[:digit:]]{3,})$" ]]

then

mv "${BASH_REMATCH[0]}" "${BASH_REMATCH[1]}.${BASH_REMATCH[3]}.${BASH_REMATCH[2]}"

fi

done