rvlc: 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/rvlc - from package: vlc-nox

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

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