if you get a bunch of files that have an undesirable prefix and you want to remove it, just tell this script the prefix

rename.sh

#!/bin/bash
# takes an argument of an undesired prefix then removes it from all files in dir

# if no arg is passed, prompt for name
if [ $# -eq 0 ]
  then
    read -p 'What prefix do you want to remove?: '
    prefix=$REPLY
  else
    prefix=$1
fi

length=${#prefix}
removeLength=$(($length + 1))

for name in $prefix*
do
    newname="$(echo "$name" | cut -b$removeLength-)"
    mv "$name" "$newname"
done