Bash command to remove leading zeros from all file names

Question

I have a directory with a bunch of files with names like:

001234.jpg
001235.jpg
004729342.jpg

I want to remove the leading zeros from all file

Answer 1

Here's one that doesn't require sed:

for x in *.jpg ; do let num="10#${x%%.jpg}"; mv $x ${num}.jpg ;  done

Note that this ONLY works when the filenames are all numbers. You could also remove the leading zeros using the shell:

for a in *.jpg ; do dest=${a/*(0)/} ; mv $a $dest ; done

Answer 2

In Bash shell you can do:

shopt -s nullglob
for file in 0*.jpg
do
   echo mv "$file" "${file##*0}"
done