chiark-named-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/bin/chiark-named-conf - from package: chiark-scripts

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

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