pfsabsolute: command not found

Have You tried accessing the binary with the full path?

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/pfsabsolute - from package: pfstools

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