difference between rhel 6 and 7 and 8

Red Hat Enterprise Linux (RHEL) is a popular distribution of the Linux operating system. There have been several versions of RHEL released over the years, with the latest being version 8. Here are some key differences between RHEL 6, 7, and 8:

RHEL 6: This version was released in 2010 and is no longer supported. It is based on the Linux kernel 2.6 and includes features such as virtualization support, improved scalability and security, and support for up to 64 CPU cores.

RHEL 7: This version was released in 2014 and is currently in maintenance mode, with support set to end in 2024. It is based on the Linux kernel 3.10 and includes features such as support for Docker containers, improved performance and scalability, and support for up to 160 CPU cores.

RHEL 8: This version was released in 2019 and is currently the latest version. It is based on the Linux kernel 4.18 and includes features such as support for Linux containers, improved security and compliance, and a new modular architecture. It also includes new tools for cloud environments, such as the Cockpit management console and support for the Ansible configuration management system.

In general, each newer version of RHEL includes updates and improvements over the previous version, such as new kernel versions, additional features, and enhanced security and performance.