pfsclamp: 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/pfsclamp - from package: pfstools

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

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