kdbg: command not found

Have You tried accessing the binary with the full path?

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/kdbg - from package: kdbg

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