fwbedit: 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/fwbedit - from package: fwbuilder

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

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