btmakemetafile.bittorrent: 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
/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/btmakemetafile.bittorrent - from package: bittorrent

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