pymissile: 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/pymissile - from package: pymissile

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

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