roarlight: 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/roarlight - from package: roarclients

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

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