kpengine: 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/kpengine - from package: kanjipad

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

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