pfrom: 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/pfrom - from package: heimdal-workstation

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

On Debian possible default full paths are:

/usr/bin/pfrom - from package: heimdal-clients

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

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