pfsdisplayfunction: 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/pfsdisplayfunction - from package: pfstools

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

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