pfc: 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/pfc - from package: xl2tpd

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

On Debian possible default full paths are:

/usr/bin/pfc - from package: xl2tpd

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

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