terd: command not found

Have You tried accessing the binary with the full path?

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/terd - from package: tcm

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