kvkcard: 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/kvkcard - from package: libchipcard-tools

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

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