fpick: 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/fpick - from package: mh-book

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

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