mh_make: 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/mh_make - from package: maven-debian-helper

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

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