tstd: 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/tstd - from package: tcm

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

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