Bash Script for viewing folder sizes. Just put this code into a file /bin/treesize and make it executable. Then any system user can get a list of directory sizes within a directory by just running treesize from any directory.

treesize.sh

#/bin/sh
du -k --max-depth=1 | sort -nr | awk '
     BEGIN {
        split("KB,MB,GB,TB", Units, ",");
     }
     {
        u = 1;
        while ($1 >= 1024) {
           $1 = $1 / 1024;
           u += 1
        }
        $1 = sprintf("%.1f %s", $1, Units[u]);
        print $0;
     }
    '

Interesting, but not your source, right?

Correct, I believe the original credit goes to Andrew: https://blog.aclarke.eu/2011/09/21/a-simple-treesize-shell-script-for-linux/