Rhel 7 VS Rhel 8

Red Hat Enterprise Linux 7 released on 10 June 2014 with the release name Maipo and it is based on Fedora 19
The RHEL 7.1 kernel version was 3.10.0-229 and last update till now is 7.6 - 3.10.0.-957
RHEL 7 only support 64 bit architecture
The default file system is XFS but can be choose the others as well and XFS supports 500TB partition size
Kdump supports can be upto 3TB
There are no run levels in RHEL 7 but it has targets to do the job of run levels
Boot loader version changed to Grub 2 and default database is now MariaDB as in RHEL 6 it was MySQL
In RHEL 7 service management it uses systemctl commands to manage services
RHEL 7 switched to firewalld concept for firewall configuration and security policies
The below architecture are supported

Ø 64-bit AMD

Ø 64-bit Intel

Ø IBM POWER7

Ø IBM System z

Ø Python 2 ( 2.7.X)

Ø PHP 5.4

Ø Ruby 2.0.0

Red Hat Enterprise Linux 8 initially released on 7^th May 2019 with the release name Ootpa and it is forked from Fedora 28
The initial kernel version was 4.18.0-80
The NTP implementation is not supported. Chronyd is supported
The default file system is same XFS but can be choose the others as well and XFS maximum supports is 1PB as a partition size
For software package management, DNF (YUMv4) is used. Yum still can be used as it is based on DNF technology
The below architecture are supported

Ø AMD and Intel 64-bit architectures

Ø The 64-bit ARM architecture

Ø IBM Power Systems, Little Endian

Ø IBM Z

Ø Mysql 8.0

Ø MariaDB 10.3

Ø PostgreSQL 10

Ø Redis 5.0

Ø Python 3

Ø PHP 7.2

Ø Node.js 10

Ø Ruby 2.5

RHEL 8 using the same firewalld concept for firewall (network packet filtering) configuration and security policies but using “nftables” instead of iptables
Default Gnome display server is "Wayland"

NOTE: For differences between Rhel 6 and Rhel 7 - Check the below link

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