memcard: 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/memcard - from package: libchipcard-tools

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

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