setforward: 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/setforward - from package: fastforward
/var/lib/qmail/bin/setforward - from package: fastforward

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

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