bluemon: 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/sbin/bluemon - from package: bluemon

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

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