masterha_stop: 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/masterha_stop - from package: mha4mysql-manager

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