petitboot-nc: 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/petitboot-nc - from package: petitboot

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

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