aelpf: 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/aelpf - from package: aegis

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

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