tesd: 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/tesd - from package: tcm

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