make-kpkg: 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/make-kpkg - from package: kernel-package

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

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