monav: 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/monav - from package: monav-client

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

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