pfsinrgbe: 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/pfsinrgbe - from package: pfstools

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

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