roarvumeter: command not found

Have You tried accessing the binary with the full path?

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/roarvumeter - from package: roarclients

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