dhcp-edit: 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/dhcp-edit - from package: fai-server

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

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