get_kept: 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/get_kept - from package: ladr4-apps

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

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