oggfwd: 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/oggfwd - from package: oggfwd

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

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