forwbatch: 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/forwbatch - from package: mh-book

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

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