bouncesaying: 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/bouncesaying - from package: qmail
/var/lib/qmail/bin/bouncesaying - from package: qmail

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

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