mm-config: command not found

Have You tried accessing the binary with the full path?

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/mm-config - from package: libmm-dev

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