centos network card settings

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If your network card does not show up there, then it not be enabled on boot, In this case, open the file /etc/sysconfig/network-scripts/ifcfg-eth0
nano /etc/sysconfig/network-scripts/ifcfg-ens33
and set ONBOOT to yes:
[...]
ONBOOT=yes
[...]
and reboot the server.
Check your /etc/resolv.conf if it lists all nameservers that you've previously configured:
cat /etc/resolv.conf
If nameservers are missing, run
nmtui
and add the missing nameservers again.

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