readline-rename-v2

#!/bin/bash
find "." -type f -name "*.txt" | awk '{printf("\"%s\"\n", $0)}' | sed "p; s/\ /_/g" | xargs -n 2 mv
FNAMES=$(find "." -type f -name "*.txt")
for fname in $FNAMES
do
    LINE=$(head -n 1 "$fname")
    NEWNAME=${LINE}.txt
    mv -f "$fname" "$NEWNAME"
    echo "file $fname renamed to $NEWNAME"
done