pvftobasic: 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/pvftobasic - from package: mgetty-voice

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

On Debian possible default full paths are:

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

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

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