XletSettings.py: 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/share/cinnamon/cinnamon-settings/bin/XletSettings.py - from package: cinnamon-common

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

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