qvlc: 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/qvlc - from package: vlc

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

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