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

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