DecoyDatabase: 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/DecoyDatabase - from package: topp

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

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