🧑‍💻 a blog about coding, devops, and stuff.

  • Gotcha: Dots in /etc/sudoers.d filenames

    A tale of facepalms While reviewing some Ansible modules with a colleague we stumbled upon an issue with our user creation module, and for a briefe time couldn’t understand what was going on. The module in question creates multiple Linux users, adds them to groups, and enables some to use password less sudo via the /etc/sudoers.d config […]

  • Wildcards in Prometheus queries

    Learn how to query data in Prometheus and how to use wildcards Hello and welcome to this “snippet-sized” post about Prometheus queries! Prometheus is a time-series database which means it is build to collect a lot of datasets that show values over time, for example the result of a HTTP request or the RAM usage of a […]

  • TIL: Bash select

    I was recently researching different bash prompts and stumbled upon an StackExchange answer which explains the different prompt types (PS1, PS2, PS3, and PS4). The answer explains how the PS3 prompt is used for commands like select. I did not know about select before, so that’s the real TIL here! […] PS3 is shown when the select command is waiting for […]


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