nut-nutrition: 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/nut-nutrition - from package: nut-nutrition

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

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