The regular expression above has flaws because it can also match IP addresses that fall outside the bounds of valid IPv4 addresses. We’ve used the -o option to trim the results and print only the matched parts. Tail can be combined with grep to pattern match. By default, the grep command prints the whole line that contains the matching pattern.
#Apache log grep unique ip how to#
You should now understand how to extract data out of your Apache access logs to get a good idea of the type of requests that your server is having to process. Viewing everything from a specific IP address. Sort all the data, uniquely count them, then numerically sort them from lowest to highest. Then use the awk command to only print out the $9th column of data which is the response code. Use the cat command to concatenate (read) the Apache access log. Or a POST which means a visitor has filled out information in a form and is POSTing it to the server much like you would see from a login attempt.Īwk '’ Run the following command to view the types of requests that are happening the most, either GET which means a visitor is simply requesting a resource such as a HTML page or image, HEAD which is typically a web-browser or bot checking to see if the file requested has been updated since it was last accessed.View request types GET/HEAD/POST from Apache access log Run this command to see what Apache access logs are present:ĭrwxr-xr-x 3 root at0m 4.0K Dec 31 16:47.You can run the following command to get to the /access-logs directory for that user: In this example our domain is and the cPanel username is userna5.View types of requests from Apache access log To follow along with the instructions in this article you’ll need to have either a VPS or dedicated server so that you can SSH into the server to run the commands we’ll go over. More specifically the request type, requested URL, and response codes. In this article I’ll be going over different types of requests that show up in your Apache access logs. I’ve already covered determining the cause of a server usage spike which goes over taking a particular load spike’s time stamp and correlating that with your Apache access logs, and I’ve also gone over how to view the level of traffic with Apache access logs which lets you view the hits per day, per hour, and per minute to your website.
In this article I’ll be reviewing how to use Apache access logs on either your VPS (Virtual Private Server) or dedicated server in order to determine the types of requests your website is handling.Ī lot of times the usage on your server can be greatly affected by the types of requests that are happening on your websites, if you’ve read either of my previous articles on how to do advanced server load monitoring, or you’ve setup a server load monitoring script you might be aware that your server’s load average has been recently spiking.
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