title: Shell script command to find specific file extenions
body: <p>I am looking to locate large files within my GH commit  history so that I may find these files and remove them to reduce my repo size.</p>
  <p>From <a href="https://stackoverflow.com/questions/10622179/how-to-find-identify-large-commits-in-git-history">this stack overflow thread</a>I have found a shell script that successfully lists files within my repo from largest to smallest</p>
  <pre><code>git rev-list --objects --all |
    git cat-file --batch-check='%(objecttype) %(objectname) %(objectsize) %(rest)' |
    sed -n 's/^blob //p' |
    sort --numeric-sort --key=2 |
    cut -c 1-12,41- |
    $(command -v gnumfmt || echo numfmt) --field=2 --to=iec-i --suffix=B --padding=7 --round=nearest
  </code></pre>
  <p>simply pasting this into my command line outputs the follwoing</p>
  <pre><code>etc.
  etc.
  3886fa03848b  9.8MiB Python_scripts/cache/3948da8721027dc20b065e90c40573feff0bd651.json
  ecc305ad772f  9.8MiB Python_scripts/cache/8c0751d1550c66250a435e83117deb36dcfd77ba.json
  d25525e0a60c  9.8MiB Python_scripts/cache/6becf6f5e0c1547f43ef1ff7356d486e5358cbde.json
  bd1cdcf0c45f  9.8MiB Python_scripts/cache/b3d00f1524a2edfe9397f60b8400fb5ac62037e7.json
  df01689f9074  9.8MiB Python_scripts/cache/a44395ec06f9451db5f03f042141458ae977c261.json
  217a805355fb  9.8MiB Python_scripts/cache/9ad253e8419bcc49278bc8da8f81d3e1ecdadaf6.json
  72fa31033b72  9.8MiB Python_scripts/cache/800c9f1fea258738c3d992495a8f2f2b15ecc576.json
  ea86a352aaf2  9.8MiB Python_scripts/cache/4a34d6bd3b25243bbac28c50304181555be1d6a9.json
  806729ee0224  9.9MiB Python_scripts/cache/d0ab10701a112ad55e3131d765decbc01a10dc88.json
  7ded9e2268c8  9.9MiB Python_scripts/cache/f357efd0808e655071e19f7d4e4671f1adfaf407.json
  6db94f66e641  9.9MiB Python_scripts/cache/4f2e5392ee1018b63ee8982dbcae36edfcbfa9bb.json
  f67da0d97ff6  9.9MiB Python_scripts/cache/282d8e0660282f045e846c52dbb7fddd3a3b5670.json
  cac7d279b112   10MiB Python_scripts/cache/fab764e344ae8680dc445f11512cf065d0a2ad9c.json
  af8c4882734f   10MiB Python_scripts/cache/46395651237d0c497f2772595dc2c9e91702b49b.json
  78ae7b236719   11MiB articles/openinfra.html
  </code></pre>
  <p>I would like to add the ability for this script to obtain only files with the .json extension so that I may find all commit hashes and <a href="https://stackoverflow.com/questions/2100907/how-to-remove-delete-a-large-file-from-commit-history-in-the-git-repository">purge from the repo</a></p>
  <hr />
  <p>The thread top comment suggests that further filtering is possible (<a href="https://stackoverflow.com/questions/10622179/how-to-find-identify-large-commits-in-git-history">too low rep to post image</a>):</p>
  <hr />
  <p>Currently I have tried similar approaches to <a href="https://stackoverflow.com/questions/5377139/how-to-find-all-files-ending-with-rb-with-linux">this</a> <code>find . -type f -name \*.rb</code> but using .json over .rb and <code>find . | grep *.json</code> however when adding  both of these to the script it fails to run within the command line</p>
  <p>So really I am just looking for a line that will output only files with the .json extension, if at all possible (apoligies for my lack of experince with shell scripts!)</p>