pvfsine: 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 CentOS possible default full paths are:

/usr/bin/pvfsine - from package: mgetty-voice

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/pvfsine - from package: mgetty-pvftools

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

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