dbeacon: 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/dbeacon - from package: dbeacon

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

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