u/broken_py

Looking to learn sed, awk, and regular expressions properly.

What are the best free resources—books, websites, tutorials, courses, or hands-on exercises—you’d recommend?

Also, any good book recommendations for learning these tools from beginner to advanced?

Hi everyone,

I'm planning to start preparing for the RHCSA v10 (EX200) exam and would like to do it primarily using free resources before investing in any paid courses.

I'm looking for recommendations on:

• Free RHCSA study materials
• YouTube channels/playlists that cover the latest exam objectives
• Free hands-on labs or practice exercises
• GitHub repositories with RHCSA practice questions
• RHEL 10 lab setup guides
• Any free mock exams or exam-like scenarios

For those who have recently passed RHCSA, which free resources were the most helpful? Are there any specific websites, blogs, or study plans you'd recommend?

I'd also appreciate any advice on how closely the free resources align with the current exam objectives and whether there are any gaps I should be aware of.

Hi everyone,

I'm starting to learn Ansible and looking for recommendations.

Can anyone suggest:

• Good books for beginners
• Free YouTube tutorials/courses
• Hands-on projects to practice

Would love to hear what helped you learn Ansible effectively.

Hi everyone,

I'm a Linux administrator looking to improve my automation and scripting skills by learning Python. I already have a basic understanding of Linux administration, shell scripting, and system management, but I'd like to start using Python to automate routine tasks, manage servers, parse logs, interact with APIs, and build more advanced administration tools.

I'm looking for recommendations on:

• Beginner-to-intermediate Python resources focused on system administration
• Books, online courses, or YouTube channels
• Hands-on projects for Linux admins
• Resources covering modules commonly used in administration (e.g., os, subprocess, pathlib, paramiko, requests)
• Real-world examples of Python in Linux/DevOps environments

If you've followed a learning path that worked well for you, I'd love to hear about it. Any suggestions, tips, or resource recommendations would be greatly appreciated.

Hi everyone,

I’m looking to learn Terraform for managing VMware/vSphere infrastructure.

Can anyone recommend:

• Official documentation
• Good YouTube tutorials/playlists
• Books or learning resources
• Beginner to intermediate hands-on labs

Main focus is VM provisioning and VMware automation using Terraform.

Looking for resources to learn Docker .

Would really appreciate if anyone could share beginner-friendly resources that helped you learn.

Could be YouTube videos, courses, docs, roadmaps, or small projects to practice with.

Hi everyone,

I’m looking for guidance and resource recommendations to learn VMware vSphere from scratch to administration level.

Specifically, I want to learn:

• ESXi installation
• vCenter Server setup and configuration
• Networking (vSwitch, distributed switch basics)
• Storage (datastores, iSCSI/NFS basics)
• Cluster features (HA, DRS, vMotion)
• Day-to-day vSphere administration

What I’m looking for:

I would really appreciate if anyone can suggest:

• Good YouTube playlists (beginner → advanced)
• Any structured courses or lab-based learning series
• Any books worth reading (even if slightly older but conceptually strong)
• Hands-on lab setups or home lab guides

I’ve seen a lot of scattered videos online, but I’m looking for something structured and practical, ideally covering a full vSphere environment end-to-end.

https://preview.redd.it/ykr3bxlkio0h1.png?width=711&format=png&auto=webp&s=a8aee155d669b995a0a601b57d03a8861946842f

https://preview.redd.it/qiloxnzoio0h1.png?width=722&format=png&auto=webp&s=8be8c096bd55e1816d10b617920426277f3cbcda

I’m setting up a Linux system user (devuser) with sudo privileges for basic system administration tasks, but I want to restrict them from changing the root password.

Here is my current sudoers configuration in /etc/sudoers.d/devuser:

Cmnd_Alias SYSOPS = /usr/bin/dnf, /usr/bin/systemctl, /usr/bin/journalctl, /usr/bin/ping, /usr/bin/curl, /bin/su

Cmnd_Alias PASSWD = /usr/bin/passwd

devuser ALL=(ALL) NOPASSWD: SYSOPS, !PASSWD

What I want to achieve:

• Allow devuser to run basic admin commands (dnf, systemctl, logs, networking tools, etc.)
• Prevent devuser from changing the root password using passwd root or similar methods

What I’ve tried:

• Avoiding passwd in allowed commands
• Trying to explicitly block it with !passwd, but it doesn’t seem working
• Various sudoers configurations, but the restriction are not enforced

Any guidance or best practices would be appreciated.

I’ve been working as a Linux sysadmin for a while now .I want to start contributing to open source projects—but not just through application code. I’m especially interested in contributing from a sysadmin/DevOps perspective.

I’d love to hear from others who are already doing this:

• How did you get started contributing as a sysadmin/DevOps engineer?

• Are there specific types of projects that are more open to infra/ops contributions?

• How do you identify repos that actually belong DevOps/sysadmin domain?

Any tips for making meaningful contributions without deep involvement in the core codebase?

Also, if you maintain or contribute to any projects that welcome DevOps/sysadmin contributions, I’d really appreciate recommendations.