pof: 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/share/doc/mh-book/examples/mh/bin/pof - from package: mh-book

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

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