siproxd: 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/sbin/siproxd - from package: siproxd

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

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