kxd: 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/kxd - from package: kxd

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

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