pcsc_scan: 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/pcsc_scan - from package: pcsc-tools

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

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