mtype: 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 CentOS possible default full paths are:

/usr/bin/mtype - from package: mtools

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/mtype - from package: mtools

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

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