xtv: 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/xtv - from package: xtv

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