masterha_conf_host: 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/masterha_conf_host - from package: mha4mysql-manager

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

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