kboot-mkconfig: 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/kboot-mkconfig - from package: kboot-utils

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

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