m2400w: 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/m2400w - from package: printer-driver-m2300w

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

Error in other languages:
m2400w: bevel nie gevind nie
m2400w: comandă negăsită
m2400w: comando não encontrado
m2400w: commande introuvable
m2400w: command not found
m2400w: käsku ei ole
m2400w: không tìm thấy lệnh
m2400w: komanda nerasta
m2400w: Kommando nicht gefunden.
m2400w: kommandot finns inte
m2400w: komut yok
m2400w: nie znaleziono polecenia
m2400w: níor aimsíodh an t-ordú
m2400w: no se encontró la orden
m2400w: no s'ha trobat l'ordre
m2400w: opdracht niet gevonden
m2400w: parancs nem található
m2400w: perintah tidak ditemukan
m2400w: príkaz nenájdený
m2400w: příkaz nenalezen
m2400w: команда не найдена
m2400w: командата не е открита
m2400w: 命令找不到
m2400w: コマンドが見つかりません