If you have ever considered moving from WordPress to the Jekyll static site generator, you can preview this migration by running jekyll on your local Ubuntu host. This will allow you to assess whether you can find suitable replacements for the WordPress plugins you have come to rely upon, validate your content syntax, and tweak … Jekyll: exporting a WordPress blog to a static Jekyll site on Ubuntu
In a production environment, it is common to have restricted internet access on production hosts. This means that using the standard ‘gem install’ and pulling gems from the rubygems.org repository directly on that host is not an option. What is needed is a way to use an internet-connected development host that matches the target production … Ruby: Copying gems to hosts with limited internet access
Running Selenium tests is not just for quality assurance in development environments, it can also be used in production for baseline validation as well as performance and availability. If these tests are going to be run as part of a CI/CD pipeline or periodic monitoring check, then you will need to create automated headless jobs … Ruby: Creating Selenium tests using headless Chrome and Ruby2
Update Jan 2019: Instead of these instructions, please see my newer article for local BOSH installation on VirtualBox using CLI v2. BOSH is a project that unifies release, deployment, and lifecycle management of cloud based software. The BOSH CLI v1 is now older and has been replaced with CLI v2, so if you want … CloudFoundry: Install BOSH CLI v1 and BOSH Lite on Ubuntu
Logstash has a rich set of filters, and you can even write your own, but often this is not necessary since there is a out-of-the-box filter that allows you to embed Ruby code directly in the configuration file. Using logstash-filter-ruby, you can use all the power of Ruby string manipulation to parse an exotic regular expression, … ELK: Using Ruby in Logstash filters
It is time consuming to restart the entire Logstash service and refeed it input when working on a grokparsefailure. Here is an easy way to test a line of input or log file against a grok pattern: