quvi: 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/quvi - from package: quvi

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

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