strace is extremely useful for getting debug information on processes being ran by an application that you don’t have compiled from source (or available source). Each line in the trace contains the system call name, followed by its arguments in parentheses and its return value. Below are some examples: Run strace against /bin/foo and capture… Read More »
Note: You may have to install bc from a yum repos for this script to work. Also, apache must be running. If you need to troubleshoot and optimally configure Apache based on your current load, I highly recommend putting this shell script in a file named apachetuner.sh and giving it execute permissions. This will tell you… Read More »
First, make sure you Virtual Host container with your site configuration has the following section: <Directory “/var/www/path/to/your/website/html”> allow from all Options -Indexes AllowOverride All </Directory> This will you to create .htaccess files to have directory level control over certain sections of your site. Next, we need to create the .htaccess file. Go to your web… Read More »
If you use the mod status module and you find that javascript and images are killing your Apache performance and using a lot of resources but you can not afford CDN services, here is a solution. First, confirm you have the mod_expires module installed in Apache. Searching the module under /etc/httpd/conf/httpd.conf will show you if… Read More »
To rewrite a https://www.domain.com to https://domain.com use this rule in the VHost config: RewriteEngine On RewriteCond %{HTTP_HOST} ^www\.(.*) RewriteRule ^(.*)$ https://%1/$1 [R=301,L] Also for a simple redirect from http to https you can do the following: Redirect permanent / https://tag401kadvantage.com/ As I come up with good rewrite rules, I will add them here!
This module will help you in the event that Apache is using a lot of CPU or causing performance problems. If this occurs, follow these instructions to enable the server status module and identify where the problem lies. http://httpd.apache.org/docs/2.2/mod/mod_status.html Essentially, you’ll just want to modify your /etc/httpd/conf/httpd.conf file (location may vary depending on distro) and… Read More »