Httpd.conf Error Log Customlog

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

Apache Access Log Location

very comprehensive and flexible logging capabilities. This document describes how to configure its logging capabilities, and how apache error log format 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 ModulesRelated

Apache Log Rotation

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 provide logging apache access log format response time 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 ErrorLog directive, is the

tr rotatelogs is a simple program for use in conjunction with Apache's piped logfile feature. It supports rotation based on a time interval or maximum size of the log. Synopsis Options Examples Portability See alsoComments Synopsis rotatelogs

Apache Log Rotation Windows

[ -l ] [ -L linkname ] [ -p program ] [ -f ] [

Apache Access Log Example

-t ] [ -v ] [ -e ] [ -c ] [ -n number-of-files ] logfile rotationtime|filesize(B|K|M|G) [ offset ] Options -l Causes apache log format %d the use of local time rather than GMT as the base for the interval or for strftime(3) formatting with size-based rotation. -L linkname Causes a hard link to be made from the current logfile to the specified link https://httpd.apache.org/docs/2.4/logs.html name. This can be used to watch the log continuously across rotations using a command like tail -F linkname. -p program If given, rotatelogs will execute the specified program every time a new log file is opened. The filename of the newly opened file is passed as the first argument to the program. If executing after a rotation, the old log file is passed as the second argument. rotatelogs does not wait for the specified program to https://httpd.apache.org/docs/2.4/programs/rotatelogs.html terminate before continuing to operate, and will not log any error code returned on termination. The spawned program uses the same stdin, stdout, and stderr as rotatelogs itself, and also inherits the environment. -f Causes the logfile to be opened immediately, as soon as rotatelogs starts, instead of waiting for the first logfile entry to be read (for non-busy sites, there may be a substantial delay between when the server is started and when the first request is handled, meaning that the associated logfile does not "exist" until then, which causes problems from some automated logging tools) -t Causes the logfile to be truncated instead of rotated. This is useful when a log is processed in real time by a command like tail, and there is no need for archived data. No suffix will be added to the filename, however format strings containing '%' characters will be respected. -v Produce verbose output on STDERR. The output contains the result of the configuration parsing, and all file open and close actions. -e Echo logs through to stdout. Useful when logs need to be further processed in real time by a further tool in the chain. -c Create log file for each interval, even if empty. -n number-of-files Use a circular list of filenames without timestamps. With -n 3, the series of log files opened would be "logfile", "logfile.1", "logf

Basics Access and Error Logs General Configuration Debian/Ubuntu/Linux Mint Configuration Redhat/Fedora/CentOS Configuration OpenSUSE Configuration Applicable Modules https://www.loggly.com/ultimate-guide/apache-logging-basics/ ↑ 0 Apache Logging Basics Log Files An Apache log is a record of the events that have occurred on your Apache web server. Apache stores two kinds of logs: Access Log Contains information about requests coming in to the web server. This information can include what pages apache access 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 +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" apache access log 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] 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 “getpw