daemon: 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/daemon - from package: daemon

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