bluemon-query: 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/bluemon-query - from package: bluemon

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

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