How to GREP error log for a specific domain - Linux

In many cases when you are bothering with error logs and bugging out whats bothering your server, you might end up with unable to see which domain is causing the problems, in such cases all you need is a simple command for one specific domain. 

Use:

 grep domainname.com /usr/local/apache/logs/error_log

Similarly you can get access_log and so on for the required domain :) Hope it helps.

Good luck!!