Hacktoberfest 2020: Fix the deadlink

Currently, there are a couple of deadlinks in README.md such as these in Content Table, you click these it goes nowhere and that's really bad user experience:

Acceptance Criteria:

• Create a section for each deadlink in the content table and add text for example "Coming soon" or something, such that users know that content is work in progress.

Difficulty

• Easy

Hi there,
I have updated the project to python3, and added future modules that are needed for Sysadmin and DevOps.
Could you authorize the pull-request?

Hacktoberfest 2020: Review, Correct and Suggest

Python3 for Systems Administrator is now under 30 stars and looks like the open-source community is finding it very useful. Thus, we more people reviewing the document and adding more content.

Acceptance Criteria

1. Review the content on Python3 for Systems Administrator (Difficulty: Easy)
2. Find where things should/could be made better such as grammar fixes, command typo, and overall make it easier for users to understand (Difficulty: Easy)
3. Suggestion for new content or modify existing material, for e.g: examples and so on (Difficulty: Medium)

Go ahead submit the pull-request.

Puru,
Happy Hacking