update-menu-lst: 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/update-menu-lst - from package: pv-grub-menu

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

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