kx: 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/kx - from package: heimdal-clients-x

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

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