card: 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 CentOS possible default full paths are:

/usr/bin/card - from package: a2ps

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/card - from package: a2ps

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

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