python-mkdebian: command not found

Have You tried accessing the binary with the full path?

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/python-mkdebian - from package: python-distutils-extra

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