gnome-settings-daemon: 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/gnome-settings-daemon - from package: gnome-settings-daemon

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

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