nfcapd: 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/nfcapd - from package: nfdump

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

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