python-dbg: 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/python-dbg - from package: python-dbg

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

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