RHEL 8 Features

wikipedia:RHEL 8 New features from RHEL 8.0 (05/2019): Release Notes https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/8.0_release_notes/index and announcement.

• Upstream Linux kernel 4.18
• YUM package manager is now based on the DNF technology
• nginx 1.14 and Varnish Cache 6.0 now supported
• nftables framework replaces iptables
• OSCAP add-on enabled by default

Filesystem and Storage

• XFS now supports shared copy-on-write data extents
• Btrfs file system is not supported
• ext4 file system now supports metadata checksum (already available since 2012 in Linux kernel 3.5)
• Stratis new local storage manager as technology preview
• LVM no longer used clvmd, it uses lvmlockd
• LVM no longer uses lvmetad daemon for caching metadata and always read metadata from disks.

Containers

• Docker not included. Use podman, buildah, skopeo, and runC tools
• rootless containers is available as a technology preview

Databases

• MongoDB dropped due to license issues
• MariaDB Galera Cluster standard part of MariaDB

RHEL 8.4 (2021)

• https://www.redhat.com/en/blog/stability-plus-innovation-red-hat-enterprise-linux-84-now-ga
  • OSTree
  • Podman now has support in RHEL for auto-updating container images
  • RELP
  • SSH server and client system roles https://www.redhat.com/en/blog/automating-and-managing-ssh-server-configuration-rhel-system-roles-part-1

Related terms

• NetworkManager
• sudo dnf upgrade --refresh
• AppStreams

See also

• RHEL: RHEL9, RHEL 8 Features, RHEL 7 Features, CentOS, /etc/redhat-release, RHSCL, Extended Update Support (EUS), RHEL minor releases, RHUI, AlmaLinux, Rocky Linux

https://developers.redhat.com/blog/2019/05/07/red-hat-enterprise-linux-8-now-generally-available/

https://kernelnewbies.org/Linux_4.18

https://kernelnewbies.org/Linux_3.5?highlight=%28Metadata%29%7C%28checksumming%29