Trouble after updating Centos 7?

Question

linux

Friends, there is Centos 7, everything works fine, but after updating yum update -y, the network will disappear in general, what is the reason is not clear.
What was accepted:
Thought an issue in NetworkManager disabled it altogether.
Tried to remove it completely via
Yum remove NetworkManager failed.
Friends help me understand why?

Answer 1

Without logs, the answer is standard: "Because the moon is in the taurus phase."

Answer 2

not CentOS (not familiar with it)
, but I had an interesting experience updating Ubuntu from 14.04 to 16.04
during the upgrade, network interfaces received new names like enoX or ensY
And the settings in /etc/interfaces are registered for old ethX, so the network during configuration is not configured and did not rise
diagnostics simple

[email protected]:~$ dmesg | grep eth[01]
[    1.874054] e1000 0000:02:00.0 eth0: (PCI:66MHz:32-bit) 00:50:56:11:11:11
[    1.874672] e1000 0000:02:00.0 eth0: Intel(R) PRO/1000 Network Connection
[    2.237540] e1000 0000:02:02.0 eth1: (PCI:66MHz:32-bit) 00:50:56:11:11:12
[    2.238185] e1000 0000:02:02.0 eth1: Intel(R) PRO/1000 Network Connection
[    2.240464] e1000 0000:02:02.0 ens34: renamed from eth1
[    2.243988] e1000 0000:02:00.0 ens32: renamed from eth0

Answer 3

Telepaths on vacation. Where are the logs?

Answer 4

Thanks everyone. The issue was resolved after the update, the drivers for the internal network card did not get up.