mmafm: 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/mmafm - from package: lcdf-typetools

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

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