monkeystudio: 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/monkeystudio - from package: monkeystudio

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

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