Technology Insights

WordPress theme.php – Fatal error: Call to a member function read()

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In the process of creating a mirror image of a current WordPress to be used for development purposes I ran into a PHP error that I had not seen before. The current version of WordPress was working without issue but because many of the settings needed to be modified for the installation to work with a different domain pointed to it. Even after modifying the settings that I had modified in previous instances to make WordPress work with an updated domain name I was still getting an error related to the WordPress Theme. I enabled some PHP error logging, started looking for answers on the web, and then implemented some changes described below to resolve the error.

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Use Nagios To Check Process Size And Provide Alerts Based on Process Megabyte Size

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Nagios is an awesome open source application that provides a way to monitor pretty much anything that you can think of on your network. There are tons of plugins written for Nagios that will monitor anything from PostgreSQL database size to the number of users logged into a server. Today I needed to start monitoring the size of a Ruby process that has been growing out of hand so the below is what I came up with being the best solution. Follow the directions below to deploy a Perl script that will use SNMP to retrieve Linux server process size.

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Stopping nagios: kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec … or kill -l [sigspec]

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When attempting to stop or restart Nagios on CentOS I was receiving the below error. This has been an issue for me for quite some time however I was to lazy to even put a patch in place and always just would kill the Nagios processes by hand. Tonight I was modifying some Nagios configuration files and got enoyed enough that I first attempted to upgrade Nagios to the latest available on the rpmforge repo and when the problem still existed I decided to figure out a solution.

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MySQL Command To Update Just The Matching Part Of A Column

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Earlier I set up a development WordPress site that mirrored a live WordPress installation. To do this I dumped the entire WordPress database using mysqldump and then imported it into a new database with mysql. Among other things that needed to be changed I needed to update any links that referenced the live site’s URL with the development site’s URL. Below I provide the command to make such an update to only a matching portion of a column in row located in a MySQL database.