Apache Customlog Vs Error Log

Contents Apache Error Log Format Apache Rotatelogs Apache Default Log Format

necessary to get feedback about the activity and performance of the server as apache access log location well as any problems that may be occurring. The Apache HTTP Server

Apache Error Log Format

provides very comprehensive and flexible logging capabilities. This document describes how to configure its logging capabilities, and apache access log format response time how to understand what the logs contain. Overview Security Warning Error Log Per-module logging Access Log Log Rotation Piped Logs Virtual Hosts Other Log Files See alsoComments Overview Related apache access log example ModulesRelated Directivesmod_log_configmod_log_forensicmod_logiomod_cgi The Apache HTTP Server provides a variety of different mechanisms for logging everything that happens on your server, from the initial request, through the URL mapping process, to the final resolution of the connection, including any errors that may have occurred in the process. In addition to this, third-party modules may

Apache Rotatelogs

provide logging capabilities, or inject entries into the existing log files, and applications such as CGI programs, or PHP scripts, or other handlers, may send messages to the server error log. In this document we discuss the logging modules that are a standard part of the http server. Security Warning Anyone who can write to the directory where Apache httpd is writing a log file can almost certainly gain access to the uid that the server is started as, which is normally root. Do NOT give people write access to the directory the logs are stored in without being aware of the consequences; see the security tips document for details. In addition, log files may contain information supplied directly by the client, without escaping. Therefore, it is possible for malicious clients to insert control-characters in the log files, so care must be taken in dealing with raw logs. Error Log Related ModulesRelated DirectivescoreErrorLogErrorLogFormatLogLevel The server error log, whose name and location is set by the Apache Default Log Format

can include what pages people are viewing, the success status of requests, and how long the request took to respond. It looks something like this: Apache 10.185.248.71 - - [09/Jan/2015:19:12:06 https://httpd.apache.org/docs/2.4/logs.html +0000] 808840 "GET /inventoryService/inventory/purchaseItem?userId=20253471&itemId=23434300 HTTP/1.1" 500 17 "-" "Apache-HttpClient/4.2.6 (java 1.5)" 1 10.185.248.71 - - [09/Jan/2015:19:12:06 +0000] 808840 "GET /inventoryService/inventory/purchaseItem?userId=20253471&itemId=23434300 HTTP/1.1" 500 17 "-" "Apache-HttpClient/4.2.6 (java 1.5)" Error Log Contains information about errors that the web server encountered when processing requests, such as when files are missing. It looks something like this: [Thu Mar 13 19:04:13 2014] [error] [client 50.0.134.125] https://www.loggly.com/ultimate-guide/apache-logging-basics/ File does not exist: /var/www/favicon.ico 1 [Thu Mar 13 19:04:13 2014] [error] [client 50.0.134.125] File does not exist: /var/www/favicon.ico Location Access and error log files are stored on individual web servers. The exact location of your Apache logs depends on your operating system: Debian/Ubuntu/Linux Mint Redhat/Fedora/CentOS Configuration OpenSUSE The following general default logging configuration directives are specified in absence of specific virtual host container configuration. Log Level Directive This specifies log message severity. Default is “warn.” LogLevel warn Table of Level Severities Severity Description Example emerg Emergencies — system is unusable “Child cannot open lock file. Exiting” alert Immediate action required “getpwuid: couldn’t determine user name from uid” crit Critical conditions “socket: Failed to get a socket, exiting child” error Error conditions “Premature end of script headers” warn Warning conditions “child process 1234 did not exit, sending another SIGHUP” notice Normal but significant condition “httpd: caught SIGBUS, attempting to dump core in …” info Informational “Server seems busy…” debug Debug-level messages “opening config file …” trace1-8 Trace messages “proxy: FTP: … ” Note regarding a particular level: Levels are l

Web Dev @ Microsoft SEO By WooRank Books Courses Screencasts Newsletters Versioning Shop Forums Advertise Contribute Contact Us Our Story 995kSubscribers 132kFollowers 80kFollowers Programming Article Configure Web Logs https://www.sitepoint.com/configuring-web-logs-apache/ in Apache By Blane Warrene February 23, 2004 One of the many pieces of the Website puzzle is Web logs. Traffic analysis is central to most Websites, and the key to getting the most out of https://raymii.org/s/snippets/Apache_access_and_error_log_to_syslog.html your traffic analysis revolves around how you configure your Web logs. Apache is one of the most -- if not the most -- powerful open source solutions for Website operations. You will find that Apache's Web apache access logging features are flexible for the single Website or for managing numerous domains requiring Web log analysis. Author's Note: While most of this piece discusses configuration options for any operating system Apache supports, some of the content will be Unix/Linux (*nix) specific, which now includes Macintosh OS X and its underlying Unix kernel. For the single site, Apache is pretty much configured for logging in the default install. The initial httpd.conf file (found apache access log in /etc/httpd/conf/httpd.conf in most cases) should have a section on logs that looks similar to this (Apache 2.0.x), with descriptive comments for each item. Your default logs folder will be found in /etc/httpd/logs. This location can be changed when dealing with multiple Websites, as we'll see later. For now, let's review this section of log configuration. ErrorLog logs/error_log

LogLevel warn

LogFormat "%h %l %u %t "%r" %>s %b "%{Referer}i" "%{User-Agent}i"" combined
LogFormat "%h %l %u %t "%r" %>s %b" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent

CustomLog logs/access_log combined

Error Logs The error log contains messages sent from Apache for errors encountered during the course of operation. This log is very useful for troubleshooting Apache issues on the server side. Apache Log Tip: If you are monitoring errors or testing your server, you can use the command line to interactively watch log entries. Open a shell session and type "tail –f /path/to/error_log". This will show you the last few entries in the file and also continue to show new entries as they occur. There are no real customization options available, other than telling Apache where to establish the file, and what level of error

access/error log to syslog15-12-2013 | Remy van Elst Table of ContentsThis snippet shows you how to redirect the Apache access log to syslog using the Customlog statement, and the Error log to syslog via the ErrorLog statement. Using the double pipe prevents spawning a shell for every hit. Append the below line to a vhost to have everything logged to syslog. CustomLog "||/usr/bin/logger -t apache -i -p local5.notice" combine The error log can be appended to syslog using the following statement: ErrorLog syslog:local6 More info on the Errorlog: http://httpd.apache.org/docs/2.2/mod/core.html#errorlog More info on the Customlog module: http://httpd.apache.org/docs/2.2/mod/modlogconfig.html#customlog Tags: acces-log, apache, error-log, log, logging, syslog, Generated by ingsoc | Cluster Status | About