gsettings: 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/gsettings - from package: libglib2.0-bin

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

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