tfet: 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/tfet - from package: tcm

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

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