dtc_write_xenhvm_conf: 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/sbin/dtc_write_xenhvm_conf - from package: dtc-xen

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

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