pffinfo: 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/pffinfo - from package: pff-tools

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

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