aebuffy: 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/aebuffy - from package: aegis-tk

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

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