Programming

#!/bin/bash

# minimum number of files per directory
cc=50
# directory prefix
dest_prefix=./LHR-
# starting suffix for directory (will be zero padded to 3 spaces)
d=1

for file in *.tif; do
        prefix=${file%%_*}

        # only increment destination if we've reached $cc AND
        #   it's a different prefix
        if ((++c > cc)) && [[ $prefix != $prev_prefix ]]; then
                ((c=1,d++))
        fi

        # zero pad destination directory
        printf -v dest "%s%03d" "$dest_prefix" "$d"

        # create destination directory
        mkdir -p "$dest"

        # verify functions correctly before moving stuff
        echo "[$c/$cc] $file -> $dest"
#       mv "$file" "$dest"

        prev_prefix=$prefix
done