Batch rename file with regex: remove prefix

Question

I have files <uuid>_CS_Filename, and i want replace uuid_ => with ".*?_" to "".

How can I do this?

So, for;

1557acc7f3cd5d1538b71fe77bcf9ec0_My_filename_ch101.pdf

I want:

My_filename_ch101.pdf

I don't want to install some 3rd party packages; I searched the internet and only found brew install rename.

Answer 1

Use sed:

filename="1557acc7f3cd5d1538b71fe77bcf9ec0_My_filename_ch101.pdf"
newname=$(echo $filename | sed -e 's/^[a-z0-9]*_//g')
# newname is "My_filename_ch101.pdf"

Assume the files to rename are all in current directory:

for f in *; do
  mv "$f" "$(echo $f | sed -e 's/^[a-z0-9]*_//g')"
done