Apache Error Log Command Line
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Getting Started Home Page | Knowledge Base 24 X 7 HEROIC SUPPORT 800.580.4985 (1-517-322-0434) Find Answers To Web Hosting Questions SearchSearch How To: Watch Server Logs in Real Time Category: Technical command line apache log analyzer Support Servers do a fantastic job of writing down in log files what
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is happening right that moment. While going back and reading logs later to determine what happened in the past apache command line example is helpful, it is also useful to watch logs in real time. Linux provides a command line tool that lets us do just that: tail. A Brief Introduction to Tail The primary purpose restart apache command line of tail is to grab the last few lines of a file (ten lines by default). To do so with any file would look like this: tail example.txt Tail also gives us a way to watch files that are updated by other programs in real time: the -f flag. tail -f example.log While the -f flag is not exclusively for log files, it is the most
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common use case. When you are through following the log, you will need to press the Control and c keys at the same time in order to stop the tail process. Good Times to Tail: Apache Suppose there is a link on your site that, every time you click on it, gives you an Apache error. Depending on how your site is coded, the error page may not provide you with much information beyond the fact that there is an error message. First, start tailing the error log (n.b.: the following examples assume you have a cPanel server): tail -f /usr/local/apache/logs/error_log If the log is not updating frequently, it is a good idea to hit the spacebar a few times so the error you are trying to reproduce is set apart from previous errors. Then, go back to your browser and click on the link that was giving you the error. It should provide an entry in the error log that matches what you have seen in the browser. This is a surefire way to verify that the log entry corresponds to clicking on that particular link on the site. Good Times to Tail:
necessary to get feedback about the activity and performance of the server as well as any apache command line version problems that may be occurring. The Apache HTTP Server provides very comprehensive apache command line parser example and flexible logging capabilities. This document describes how to configure its logging capabilities, and how to understand what
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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 Directivesmod_log_configmod_log_forensicmod_logiohttps://www.liquidweb.com/kb/how-to-watch-server-logs-in-real-time/ href="./mod/mod_cgi.html">mod_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 capabilities, or inject entries into the existing https://httpd.apache.org/docs/2.4/logs.html 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 most important log file. This is the place where Apache httpd will send diagn
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting http://stackoverflow.com/questions/14060407/how-do-i-access-apache-error-logs-via-the-terminal-in-mac-os-x-10-6-8 ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes http://www.cyberciti.biz/faq/error_log-defines-file-where-script-errors-logged/ a minute: Sign up How do I access Apache error logs via the Terminal in Mac OS X 10.6.8? up vote 15 down vote favorite 5 I am having trouble with serving up my rails app on a remote computer after command line upgrading from Rails 3.0 to 3.1. So I want to take a look at what exactly is going wrong when Apache attempts to start up my app and it fails. How can I find the errors that Apache (or maybe Passenger?) is throwing via the Terminal? osx ruby-on-rails-3.1 apache2 share|improve this question asked Dec 27 '12 at 19:48 pitachip 3452416 add a comment| 2 Answers 2 active oldest votes up vote 37 down vote accepted in terminal, have you tried cat /var/log/apache2/error_log apache command line share|improve this answer answered Dec 27 '12 at 20:11 patrickmdnet 2,3381627 1 Thanks so much! I saw that this path for the location of the error log is in the httpd.conf file--just in case this isn't the path for everyone. –pitachip Jan 2 '13 at 0:11 If you just want to look at the last few lines of the log use tail /var/log/apache2/error_log instead. The error log tends to get bigger/longer with time. –victmo May 28 '14 at 23:29 add a comment| up vote 2 down vote only to complemente the others answers, I'm using the version 10.9.3 and to me, the address is: /private/var/log/apache2 share|improve this answer answered Jun 24 '14 at 5:49 Maciel Bombonato 42449 4 On OSX /var, /etc, and /tmp are symlinked to /private/var, /private/etc, and /private/tmp. –Mr. Dave Jan 28 '15 at 16:58 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged osx ruby-on-rails-3.1 apache2 or ask your own question. asked 3 years ago viewed 23970 times active 2 years ago Get the weekly newsletter! In it, you'll get: The week's top questions and answers Important commu
RedHat and Friends, Security, Suse, TroubleshootingI‘m running CentOS 5.x server with Apache 2.2 + PHP 5.x server. Can you tell me exact location for php error log file? Generally, on all production web servers displaying error to end users via a web browser is turned off using php.ini file settings. Open /etc/php.ini file and find out line that read as follows:
error_logOR use the grep command as follows:grep error_log /etc/php.ini grep ^error_log /etc/php.iniSample outputs:error_log = /var/log/httpd/php_error_logThe error_log directive defines the name of the file where script errors should be logged. The file should be writable by the web server's user. If the special value syslog is used, the errors are sent to the system logger instead. On Unix, this means syslogd and on Windows NT it means the event log. The system logger is not supported on Windows 95. If this directive is not set, errors are sent to the SAPI error logger. For example, it is an error log in Apache (/var/log/httpd/error_log file) or stderr in command line (CLI).This line define exact location for each php instance. If error_log set to syslog, open /var/log/messages file to view log. For example if error_log is set to /var/log/apache/php.errors, type the following to display error log: $ tail -f /var/log/apache/php.errors$ grep something /var/log/apache/php.errors
$ vi /var/log/apache/php.errorsSee also:PHP Log All Errors to a Log File to Get Detailed Information php.ini directives Share this tutorial on:TwitterFacebookGoogle+Download PDF version Found an error/typo on this page?About the author: Vivek Gite is a seasoned sysadmin and a trainer for the Linux/Unix & shell scripting. Follow him on Twitter. OR read more like this:Apache Log FilesHow do I find out syntax errors in my Apache web server configuration file?Apache 2: Reload HTTPD Configuration File Without Restarting Apache Config…PHP: Stop Notice and Variable Warnings in Error Log FilesHowTo: UNIX Restart Apache ServerApache 403 Forbidden Error and SolutionApache Name Based VirtualHost ExampleLinux Redirect Error Output To FileApache2 NameVirtualHost *:80 has no VirtualHosts Error and SolutionDisplay or view the perl cgi errors in a web browser{ 9 comments… add one } Anthony Thyssen April 7, 2010, 5:27 amThe problem with the default set-up on a larger multi-user linux