CentOS 7 installation problems
Hello,
It looks like you are following the NXLog EE guide instead of the CE. The file locations are different between the two releases.
CE Reference Manual:
https://nxlog.co/docs/nxlog-ce/nxlog-reference-manual.html
The configuration for CE, nxlog.conf, does in fact reside in '/etc' instead of '/opt/nxlog' like in the EE product.
You will need to edit this file with sudo vi /etc/nxlog.conf or similar. You can then run nxlog -v to verify the config. NXLog CE binary is located in /bin by default, so it should be in your path.
If everything checks out you can restart NXLog CE with systemctl restart nxlog.
That should get you where you want to be! :)
-Jesse