axfr-get: 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/axfr-get - from package: ndjbdns

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

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