nvlc: 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/nvlc - from package: vlc-nox

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

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