isenkram-autoinstall-firmware: 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/sbin/isenkram-autoinstall-firmware - from package: isenkram-cli

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

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