Shellout Tricks

Quick and dirty file rename to map some numbers

for f in train/*; do mv "$f" "$(awk -F '[,/]' '{ printf "%s/%.2f,%.2f,%.2f.wav", $1, $2 / 3, $3 / 3, $4 / 3 }' <<<"$f")"; done

Move random files from one folder to another

for i in $(seq 1 17)
do
    files=(train/*)
    files_len=${#files[@]}
    mv ${files[$(($RANDOM % files_len))]} eval/
done