u/broken_py

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.