enemy.py: 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/share/games/oneisenough/bin/enemy.py - from package: oneisenough

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

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