kaget: 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/kaget - from package: kanif

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