modupdate.auto: 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/lib/wims/bin/modupdate.auto - from package: wims

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

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