xsettingsd: 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/xsettingsd - from package: xsettingsd

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

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