lttv: 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/lttv - from package: lttv

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

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