Hello,

to be honest, i don't like NetworkManager

 

If you want to disable it in CentOS 7, this steps had better be done:

 

  1. Check/modify the /etc/sysconfig/network-scripts/ifcfg-WhatEver files in the correct way (Maybe the IPADDR, PREFIX and GATEWAY options are the most important!)
  2. Execute this commands: systemctl disable NetworkManager.service;systemctl stop NetworkManager.service;service network restart (In order to disable networkmanager, stop it and restart the "network" service)

 

Best regards,

Pablo