ID Management Security guideline for Linux, AIX, SunOS and HP UX

Applications Cybersecurity
1

I'm searching for COMPREHENSIVE ID management security guideline to manage user administration in my current job. I couldn't find it online or the books that could help.

What I need to know:

  1. User security directories and how to use it.
  2. How user should be managed.
  3. How the standard user policies should be.
  4. How to manage and check sudo logs.
  5. All about root id management.
  6. and many more that I'm suppose to know for ID management Security in corporate companies.

Please help. I really need this badly to set a standard policies and monitoring for my new project for Linux, AIX, SunOS and HP UX servers. We have about 10 000 servers which I need to standardize.