How do I use a hexadecimal range when downloading multiple files in Curl?

Question

I know that I can download a sequence of files using decimal numbers in curl:

curl site.com/file[000-100].jpg -o "file#.jpg"

But I need to download a hexadecimal series of files named file0x000 to file0x254. Can I specify this in one command line? Or can someone help me with a bash script?

Answer 1

Just put the curl in an for iterator loop like this; save this file as some name—like test.sh and make sure that is has executable permissions—then run that file as ./test.sh:

#!/bin/bash

for i in {0..254}; do
  filename=$(printf file0x%03d.jpg $i);
  echo curl site.com/${filename} -o "${filename}";
done

The above works for me in macOS Mojave (10.14.3) as well as RedHat 7 and Ubuntu 16.04. But the following is slightly simpler, but will only work correctly on RedHat and Ubuntu; on macOS there are no padded numbers:

#!/bin/bash

for i in {000..254}; do
  curl site.com/file0x$i.jpg -o file0x$i.jpg;
done