tsnd: 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/tsnd - from package: tcm

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

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