phenny: 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/phenny - from package: phenny

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

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