nanddump: 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/sbin/nanddump - from package: mtd-utils

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

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