tenletxr: 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/tenletxr - from package: heimdal-clients-x

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

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