load_stats: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/load_stats - from package: libstatgrab-examples

You may install the required package with command yum install {package}

Error in other languages:
load_stats: bevel nie gevind nie
load_stats: comandă negăsită
load_stats: comando não encontrado
load_stats: commande introuvable
load_stats: command not found
load_stats: käsku ei ole
load_stats: không tìm thấy lệnh
load_stats: komanda nerasta
load_stats: Kommando nicht gefunden.
load_stats: kommandot finns inte
load_stats: komut yok
load_stats: nie znaleziono polecenia
load_stats: níor aimsíodh an t-ordú
load_stats: no se encontró la orden
load_stats: no s'ha trobat l'ordre
load_stats: opdracht niet gevonden
load_stats: parancs nem található
load_stats: perintah tidak ditemukan
load_stats: príkaz nenájdený
load_stats: příkaz nenalezen
load_stats: команда не найдена
load_stats: командата не е открита
load_stats: 命令找不到
load_stats: コマンドが見つかりません