xbmc-send: 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/xbmc-send - from package: xbmc-eventclients-xbmc-send

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

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