numnormalize: 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 Debian possible default full paths are:

/usr/bin/numnormalize - from package: num-utils

You may install the required package with command apt-get install {package}

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