Problem After Last Update

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why it is always a Problem when a kernel, firewall or KVM update is installed ?

I have a system with a server CentOS 7 (last) and 6 KVM Clients after the Update Installation and reboot the most in Network is not functional ?

I lost NIC’s and the firewalld change the zone ……

I have always to control is the KVM Clients working ?

Have any a idea what is wrong on my system ?

Thanks for a answer,

One thought on - Problem After Last Update

  • No solid answer, I seldom see such an effect.

    One possibility, many services have a default config file installed with the service. They also may have a “local”
    config file that takes precedence if present. “local”
    may be done by location or by a specifice name variation.

    If you are configuring your services by modifying the default config file, it may be overwritten by an update.