Last updated on August 9, 2020 by Dan Nanni
Error log and access log files are a useful piece of information for system admins, for example to troubleshoot their web server, protect it from various malicious activities, or just to run various analytics for HTTP server monitoring. Depending on your web server setup, its error/access logs may be found in different places on your system.
This post may help you find Apache error log location on Linux.
On Debian-based Linux, the system-wide default location of Apache error log is
/var/log/apache2/error.log. The default location can be customized by editing Apache configuration file.
To find a custom error log location, open
/etc/apache2/apache2.conf with a text editor, and look for a line that starts with
ErrorLog. This line specifies a custom location of Apache error log file. For example, the unmodified Apache configuration file has the following line:
In this case, the location is configured using
APACHE_LOG_DIR environment variable, which is defined in
ErrorLog may point to any arbitrary path on your Linux system.
If VirtualHost is used in Apache web server,
ErrorLog directive can be specified within VirtualHost container, in which case the system-wide error log location described above will be ignored.
With VirtualHost enabled, each VirtualHost can define its own custom error log location. To find out the error log location of a particular VirtualHost, you can open
/etc/apache2/sites-enabled/<your-site>.conf, and look for
ErrorLog directive, which will show a site-specific error log file.
On Red Hat based Linux, a system-wide Apache error log file is by default placed in
/var/log/httpd/error_log. This default location can be customized by editing Apache configuration file.
To find out the custom location of Apache error log, open
/etc/httpd/conf/httpd.conf with a text editor, and look for
ServerRoot, which shows the top of the Apache server directory tree, under which log files and configurations are located. For example:
Now look for a line that starts with
ErrorLog, which indicates where Apache web server is writing its error logs. Note that the specified location is relative to the
ServerRoot value. For example:
Combine the above two directives to obtain the full path of an error log, which is by default
/etc/httpd/logs/error_log. This is a symlink to
/var/log/httpd/error_log with freshly installed Apache.
ErrorLog may point to any arbitrary location on your Linux system.
If you enabled VirtualHost, you can find the error log location of individual VirtualHosts by checking
/etc/httpd/conf/httpd.conf (or any file where VirtualHost is defined). Look for
ErrorLog inside individual VirtualHost sections. For example, in the following VirtualHost section, an error log is found in
<VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/xmodulo.com/public_html ServerName www.xmodulo.com ServerAlias xmodulo.com ErrorLog /var/www/xmodulo.com/logs/error_log CustomLog /var/www/xmodulo.com/logs/access_log <VirtualHost>
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