dconf: 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/dconf - from package: dconf-cli

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

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