alleyoop: 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/alleyoop - from package: alleyoop

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

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