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A Journey of a Thousand Miles Begins with a Single Step

Rename multiple files

My current migration from WordPress to Jekyll took me the WordPress exporter of Jekyll. It generated html files. I want to migrate them to markdown, therefore I needed a quick solution to rename all html files into files with markdown file extensions.

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Create file templates for Jekyll posts

Writing Jekyll posts always require a YAML front matter block content. To speed up the task you may create a file template for IntelliJ or Webstorm, depending which IDE from Jetbrains you are using. The procedure is equal.

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Use usermod and groupmod in Alpine Linux Docker Images

Elastic uses Alpine Linux as base image for their Elasticsearch docker images. Since v5.3.1 there will be no more supported docker images on dockerhub with Debian, it made it necessary to rewrite my docker files for my company. One obstacle is to assign the elasticsearch user to a specific uid and gid on the docker host system.

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Use ruby bundler behind a proxy

How to install the ruby bundler behind a proxy with sudo.

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Delete Elasticsearch documents by query in Version 5

To delete documents from an index has changed in Version 5. A little example how to delete documents in Elasticsearch v5.1.x, how to monitor the status and free up the disk space.

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Aggregations in the Elasticsearch Query DSL

A small example how to count documents in Elasticsearch using the Query DSL Aggregations.

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