aespasswd: 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/aespasswd - from package: bwctl-server
/usr/bin/aespasswd - from package: i2util-tools

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

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