The grimoire of a modern Linux professional

The book of spells

A quarter of a century

It has been almost 25 years since the first time I met Linux – I’m having my first gray hair indeed. I’ve been enchanted by it and I wanted to become a professional.

When I started we could install it from scratch, although the first distros were beginning to pop up … Slackware, Suse, Red Hat – not Red Hat Enterprise Linux, only Red Hat.

Me, as many others, was bold enough to use file systems such as ext2: it was risky not to use a journaled filesystem, but it was what we had, and we were stubborn enough to keep on until ResierFS and ext3 popped up. Printing was a nightmare and the layered design to support hardware devices, especially audio, was a mess (Ok, audio is still a mess, but this does not really matter on servers).

And what about the X-Window system – keep in mind that security has been designed according to the sensitivity of the mid of the ’80, but the overall design was impressive – you launch an application and it is rendered on the connected graphical display, … wherever it is.

Me, as many others, hung on because we were sure that Linux would have become one of the most used operating systems for mission critical workloads.

An operating system fully open, that we can just use, or deeply explore if we wanted to. That was exactly what I wished.

For most of us Linux means freedom, the same way the Black Pearl sounds like freedom to Captain Jack Sparrow.

Sysinit, Upstart and now systemd, … what a long way we had together; we both were young, but now I consider both of us mature: that’s why I think that it has come the right moment to share some of my notes on what I did with Linux during all of these years.

Over the years I started considering them as spells – some of them are really powerful, and I put them into my own grimoire.

Of course I do not consider them the only way of doing things, but they are what let me gradually grow as a modern Linux professional.

Of course there are other grimoires out there with other spells: this is mine, and I hope you’ll love it.

A modern Linux professional

A modern Linux professional should not only be able to operate and troubleshoot Linux: he should also have all of the soft skills required to design and implement mission critical infrastructures applying commonly used frameworks in compliance with regulators.

He should know how to operate under environments subjected to change management, as well as be able to cooperate with other team members to fulfill a project, tracking the progress to ease the governance.

And of course, he should master legacy technologies, as well the most modern ones: a lot of modern technologies relies upon old concepts and tools under the hood: there's a huge difference from operating a technology and be conscious of everything about it, be aware of its limits and know the features that can be exploited to integrate with other technologies.

But most of all, he should be positive and humble so as to contribute to the creation of a nice working environment where everyone should be proud to belong to the team, eager to meet its colleagues to share experiences and ideas.

Is Linux the best operating system in the world and do the others not worth anything? Naaa, mate, flame wars are for newbies, and religions are for priests and sorceress. We are professionals: it's another matter.

These are the topics I want to talk about in these blog pages. I hope you will enjoy them, and why not, connect each other professionally on Linkedin

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Recent Posts

This is the list of the more recent spells of the grimoire:

• HAProxy Tutorial – A Clean And Tidy Configuration Structure - One of the HAProxy strengths is not being very strict about its configuration structure, enabling it to create configurations suitable for fitting very messy scenarios. Sadly this is also its biggest maintainability pitfall: especially if you want to automate its configuration using automation tools and templates, it is up to you to define the best […]
• High Available HA Proxy Tutorial With Keepalived - HAProxy is certainly one of the most blazoned, fast and efficient (in terms of processor and memory usage) open source load balancer and proxy, enabling both TCP and HTTP-based applications to spread requests across multiple servers. In the "High Available HA Proxy Tutorial With Keepalived" we see not only how to install it in a […]
• Git With Python HowTo GitPython Tutorial And PyGit2 Tutorial - Interacting with Git using Python is a very common use case in the DevOps field: very often it is necessary to checkout application’s or scripts along with their configuration or even just checkout versioned configurations. Although more rare, it is sometimes necessary to update the checked out contents and push the committed version back to […]
• OpenID Connect With Kratos And Hydra Tutorial – Gitea OAuth - OAuth 2.0 and OpenID Connect are broadly used frameworks to address delegating of authentication and authorization. Despite their popularity they are such complex to be a tough nut to crack even for veterans: the scenarios and use cases they cover are very security sensitive and wide, so acquainting them is certainly a huge challenge very […]
• Ansible roles best practices: practical example gitea role - Ansible roles are reusable objects that provide specialized tasks lists, handlers, templates and resource files within a single delivery unit: these objects can be directly accessed from the filesystem, downloaded from Git, from the online Ansible Galaxy of from a Ansible Galaxy compatible local service, such as Pulp 3. Anyway writing custom roles is really […]

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