nfc-poll: 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

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/nfc-poll - from package: libnfc-examples

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