trbdf: 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/trbdf - from package: trscripts

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

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