Links to CentOS and CentOS-related pages, focusing specifically on the latest release, CentOS 7.5[7.6?], mostly falling off https://www.centos.org/.

Some general links:

• RHEL Sysadmin Cookbook
• The Geek Diary (CentOS 7)
• HowToForge (CentOS)

• CentOS package management
• User and group management

Linux Foundation links:

• Refspecs
  • LSB 5.0
  • FHS 3.0

• Main image downloads
• Alternative downloads

In case you want to install additional software.

Main link:

• ELRepo.org

Channels:

• elrepo
• elrepo-extras
• elrepo-testing
• elrepo-kernel

CentOS main wiki page.

• Documentation
• Tips and Tricks
• HowTos
• FAQs
  • General FAQ
  • CentOS 7 FAQ
• CentOS 7 Release Notes

All starting here.

• Release Notes
• Package Manifest

• Installation Guide
• Getting Started with Cockpit
• Migration Planning Guide
• Desktop Migration and Administration Guide

• System Administrator's Guide
• Common administrative commands in Red Hat Enterprise Linux 5, 6, and 7
• Networking Guide
• Kernel Administration Guide
• Kernel Crash Dump Guide
• Performance Tuning Guide
• Power Management Guide
• Resource Management Guide
• SystemTap Beginners Guide
• SystemTap Tapset Reference

• Storage Administration Guide
• LVM Administration Guide
• DM Multipath Configuration and Administration

• Security Guide
• SELinux User's and Administrator's Guide

• Linux Domain Identity, Authentication and Policy Guide
• Using Containerized Identity Management Services
• Windows Integration Guide
• System-Level Authentication Guide

• Developer Guide
• RPM Packaging Guide
• Anaconda Customization Guide

• Virtualization Getting Started Guide
• Virtualization Deployment and Administration Guide
• Virtualization Tuning and Optimization Guide
• Virtualization Security Guide
• Converting Virtual Machines from Other Hypervisors to KVM with virt-v2v in RHEL 7

• High Availability Add-on Overview
• High Availability Add-on Administration
• High Availability Add-on Reference
• Load Balancer Administration
• Global File System 2

• Get Started with Docker Formatted Container Images on Red Hat Systems
• Introduction to Linux Containers
• Get Started Orchestrating Containers with Kubernetes
• Building A Simple Apache Web Server in a Container

• CentOS wiki page
• certdepot.com tutorial

• Install Linux Kernel 4.14 LTS In RPM And DEB Based Systems
• How to Install or Upgrade to Kernel 4.15 in CentOS 7
• How to Upgrade Kernel on CentOS 7

• CentOS / RHEL 7 : How to extract initramfs image and edit/view it

• systemd home page
• Overview of systemd for RHEL 7
• Chapter 9: Managing services with systemd
• Arguments against systemd

• Why XFS for RHEL/CentOS 7?
• reiserfs-utils
• How to Mount an NTFS Filesystem
• Adding exFAT support

• How to add ELRepo
• li.nux.ro repo (exFAT RPMs)
• Switching to dnf

• tree