pvlook: 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/pvlook - from package: csound-utils

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

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