mtile: 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/mtile - from package: pvm-examples

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

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