The purpose of this script is to churn through a directory with a bunch of files in it that have been misnamed. It will rename files similar to a find and replace.

bash-file-rename

#!/bin/bash

# The purpose of this script is to churn through a directory with a bunch of
# files in it that have been misnamed. It will rename files similar to a find
# and replace.

#Find this string
FINDTHIS="--"
#Replace it with this string
REPLACEWITH="-"

for file in ./**; do
    if [[ -f "$file" ]]; then
        dirname="${file%/*}/"
        basename="${file:${#dirname}}"
        #Find and Replace
        newname="${basename//$FINDTHIS/$REPLACEWITH}"
        #Concatenate
        #newname="STRINGTOSTARTWITH--$basename"
        #regex Rearrange
        #newname=$(sed 's/^\(.*--\)\(.*-\)\(.*-\)\(.*-\)\(.*-\)\(.*$\)/\1\2to-\4\3\5\6/' <<< $basename)
        #echo $newname
        mv "$file" "$dirname$newname"
    fi
done

Adding more options like concatenating and using a regex to rearrange the file name