Who uses so much disk space or number of inodes?

disk-blame

#!/bin/bash
set -eu
set -o pipefail

# NOTE: numfmt and du --inode require GNU coreutils >=8.21 (Feb 2013),
# So they are not available in CentOS 6.

progname=$(basename "$0")

print_help() {
  cat <<END
Usage: $progname [options]

Options:
  -i    report inode usage
  -h    print numbers in human readable format
END
}

opt_inodes=false
opt_human_redable=false

for a; do
  case $a in
    -i)
      opt_inodes=:
      ;;
    -h)
      opt_human_redable=:
      ;;
    -ih|-hi)
      opt_inodes=:
      opt_human_redable=:
      ;;
    --help)
      print_help
      exit
      ;;
    *)
      echo "$progname: error: unknown option $a" 2>&1
      exit 1
      ;;
  esac
done

# https://unix.stackexchange.com/a/44087
my_numfmt() {
  awk '
    function human(x) {
        if (x<1000) {return x} else {x/=1024}
        s="KMGTEPZY";
        while (x>=1000 && length(s)>1)
            {x/=1024; s=substr(s,2)}
        return int(x+0.5) substr(s,1,1)
    }
    {sub(/^[0-9]+/, human($1)); print}'
}

{
  if $opt_inodes; then
    if $opt_human_redable; then
      output_filter=my_numfmt
    else
      output_filter=cat
    fi
    {
      for d in $(find . -maxdepth 1 -type d); do
        case $d in
          .|..)
            ;;
          *)
            echo "$(find $d -type f | wc -l) $d"
        esac
      done
      echo "$(find . -maxdepth 1 -type f | wc -l) ."
    } | $output_filter | column -t
  else
    if $opt_human_redable; then
      du --max-depth=1 -h
    else
      du --max-depth=1
    fi
  fi
} | sort -h