gmv

#!/usr/bin/env sh

if [ "$#" -ne 3 ]; then
  echo "use: gmv <source_dir> <file_name> <new_file_name>" >&2
  exit 1
fi

seqname=`echo 's/\/'$2'$/'$3'/'`
find $1 -type f -name $2 | while read fn; do mv -v "${fn}" "`echo "${fn}" | sed -e "$seqname"`"; done