- Microsoft Access Log Files
- Httpd Log File Format
- Httpd Log File Rotation
- Httpd Log File Format
- Log File Analyzer
- Httpd Log Files Linux
Sample Log File - Apache Extended with Cookies Log Format How do I configure the Apache Extended Log File Format? Sample Log File - Apache Common Log File Format. Blood bowl 2 campaign walkthrough. Use the following command to see the log files: cd /var/log. To view the logs, type the following command: ls. The command displays all Linux log files, such as kern.log and boot.log. These files contain the necessary information for the proper function of the operating system. The Apache HTTP Server Project. Jan 08, 2020 On CentOS the log files are placed in /var/log/httpd directory. Reading and Understanding the Apache Log Files # The log files can be opened and parsed using standard commands like cat, less, grep, cut, awk, and so on. Here is an example record from the access log file that uses the Debian' combine log format. The Common Log Format is a standardized text file format used by various web servers in generating server log files. With an Apache HTTP server, the Common Log Format can be used to produce access logs that are straightforward enough for developers and administrators to read.
WebLog Expert is a fast and powerful Apache log analyzer. It can analyze Apache log files in Combined and Common formats and give you information about your site's visitors: activity statistics, accessed files, paths through the site, information about referring pages, search engines, browsers, operating systems, and more. View the WebLog Expert sample report to get the general idea of the variety of information about your site's usage it can provide.
Sample report |
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The program is also an IIS log analyzer, it can analyze IIS log files in W3C Extended format.
| Apache Log Format |
The program supports Combined and Common log formats of the Apache web server. We recommend you to use the Combined log format because the Common log format doesn't contain information about referrers and user agents (OS, browsers, spiders). By default Apache creates log files in the Common format but the majority of hosting providers set the Combined log format for Apache on their servers.
Here is a sample of log entry in Combined format:
213.135.131.79 - - [15/May/2002:19:21:49 -0400] 'GET /features.htm HTTP/1.1' 200 9955 'http://www.weblogexpert.com/download.htm' 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461)'
Microsoft Access Log Files
Log format can be configured by editing the 'httpd.conf' file in the Apache conf directory (if you have access to this file). The configuration settings for the log file should look like the following:
# The following directive defines the 'combined' nickname
LogFormat '%h %l %u %t '%r' %>s %b '%{Referer}i' '%{User-Agent}i' combined
# The location and format of the access log file
CustomLog logs/access.log combined
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If your Apache log files contain information about multiple virtual domains (sites) hosted on the same server, you can also use the following configuration settings:
# The following directive defines the 'combinedvhost' nickname
LogFormat '%h %l %u %t '%r' %>s %b '%{Referer}i' '%{User-Agent}i' %v' combinedvhost
# The location and format of the access log file
CustomLog logs/access.log combinedvhost
Httpd Log File Format
In this case log entries will have Combined format with one extra field so you will be able to get log file analysis reports on virtual domains and filter data by this field.
You can read more about Apache logs at http://httpd.apache.org/docs/logs.html
Error Log
| Related Modules | Related Directives |
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The server error log, whose name and location is set by the ErrorLog directive, is the most important log file. This is the place where Apache httpd will send diagnostic information and record any errors that it encounters in processing requests. It is the first place to look when a problem occurs with starting the server or with the operation of the server, since it will often contain details of what went wrong and how to fix it.
The error log is usually written to a file (typically error_log on Unix systems and error.log on Windows and OS/2). On Unix systems it is also possible to have the server send errors to syslog or pipe them to a program.
Httpd Log File Rotation
The format of the error log is defined by the ErrorLogFormat directive, with which you can customize what values are logged. A default is format defined if you don't specify one. A typical log message follows:
Httpd Log File Format
[Fri Sep 09 10:42:29.902022 2011] [core:error] [pid 35708:tid 4328636416] [client 72.15.99.187] File does not exist: /usr/local/apache2/htdocs/favicon.ico
The first item in the log entry is the date and time of the message. The next is the module producing the message (core, in this case) and the severity level of that message. This is followed by the process ID and, if appropriate, the thread ID, of the process that experienced the condition. Next, we have the client address that made the request. And finally is the detailed error message, which in this case indicates a request for a file that did not exist.
A very wide variety of different messages can appear in the error log. Most look similar to the example above. The error log will also contain debugging output from CGI scripts. Any information written to stderr by a CGI script will be copied directly to the error log.
Log File Analyzer
Putting a %L token in both the error log and the access log will produce a log entry ID with which you can correlate the entry in the error log with the entry in the access log. If mod_unique_id is loaded, its unique request ID will be used as the log entry ID, too.
Httpd Log Files Linux
During testing, it is often useful to continuously monitor the error log for any problems. On Unix systems, you can accomplish this using: