btsethttpseeds: 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

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/btsethttpseeds - from package: bittornado

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