genkdmconf: 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 CentOS possible default full paths are:

/usr/bin/genkdmconf - from package: kdm

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/genkdmconf - from package: kdm

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

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