aeskulap: 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/aeskulap - from package: aeskulap

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

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