pfsoutppm: 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/pfsoutppm - from package: pfstools

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

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