simul-beacons: 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/simul-beacons - from package: mrpt-apps

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

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