nvzoom: 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/nvzoom - from package: libnvtt-bin

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

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