tvoe: 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/tvoe - from package: tvoe

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