lsdvb: 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/lsdvb - from package: dvb-apps

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

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