streamer: 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 CentOS possible default full paths are:

/usr/bin/streamer - from package: xawtv

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/streamer - from package: streamer

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

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