master1: 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/master1 - from package: pvm-examples

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

Error in other languages:
master1: bevel nie gevind nie
master1: comandă negăsită
master1: comando não encontrado
master1: commande introuvable
master1: command not found
master1: käsku ei ole
master1: không tìm thấy lệnh
master1: komanda nerasta
master1: Kommando nicht gefunden.
master1: kommandot finns inte
master1: komut yok
master1: nie znaleziono polecenia
master1: níor aimsíodh an t-ordú
master1: no se encontró la orden
master1: no s'ha trobat l'ordre
master1: opdracht niet gevonden
master1: parancs nem található
master1: perintah tidak ditemukan
master1: príkaz nenájdený
master1: příkaz nenalezen
master1: команда не найдена
master1: командата не е открита
master1: 命令找不到
master1: コマンドが見つかりません