dvbstreamer: 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/dvbstreamer - from package: dvbstreamer

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

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