documentation/docs/admin-guide/deployment/rhel9/index.md

Red Hat Enterprise Linux 9

Hardware Compatibility

• Hardware Compatibility

Production Ready

The central infrastructure (automatic provisioning, upstream package synchronisation and Puppet) are stable and production ready.

The configuration management is done with Puppet as with RHEL8.

Bugs and issues can be reported in the Linux Issues project.

Additional resource Considerations in adopting RHEL 9

Install Documentation

• Installation Documentation

Changes for Base Installation

No Support for AFS

The future support model for AFS or the service and functionality it provides is currently under consideration. Consequently it has been decided not to support AFS in the PSI RHEL9 distribution at the time being.

Network Configuration

By default the network configuration is handed over to NetworkManager which does automatic configuration.

If you wish different behaviour, e.g. for static IP addresses, please check out the Network Configuration guide.

Disk Layout

Provided disk size is 64GB for virtual machines.

Name	Path	Size	Type	LVM
root	/	16GB	xfs	yes
home	/home	2GB	xfs	yes
tmp	/tmp	2GB	xfs	yes
var	/var	16GB	xfs	yes
log	/var/log	4GB	xfs	yes
boot	/boot	1GB	ext4	no
swap	-	4GB	swap	no

Workstation Package Groups

Changed the amount of packages installed by default on workstation installation. See the comparison below:

RHEL 7&8

RHEL 9

VMware platform specific packages (platform-vmware) Container Management (container-management) Internet Browser (internet-browser) GNOME (gnome-desktop) Headless Management (headless-management) Server product core (server-product) Hardware Monitoring Utilities (hardware-monitoring) base-x (base-x) core (core) fonts (fonts) guest-desktop-agents (guest-desktop-agents) hardware-support (hardware-support) input-methods (input-methods) multimedia (multimedia) networkmanager-submodules (networkmanager-submodules) print-client (print-client) standard (standard)

Internet Browser VMware platform specific packages (platform-vmware) GNOME (gnome-desktop) Core (core) fonts (fonts) multimedia (multimedia) office-suite (office-suite) print-client (print-client)

Caveats

Missing or Replaced Packages

List of packages removed in RHEL 9

RHEL 8	RHEL 9	Remarks
mailx	s-nail	S-nail is MIME capable and has extensions for line editing, S/MIME, SMTP, IMAP, POP3, and more.
platform-python, python2 (python27:2.7), python36 (python36:3.6), python38 (python38:3.8), python39 (python39:3.9)	python3	As for all python* packages
pulseaudio	pipewire-pulseaudio	The pulseaudio server implementation has been replaced by the pipewire-pulseaudio implementation. Note that only the server implementation has been switched. The pulseaudio client libraries are still in use.
inkscape1	inkscape	Also affects inkscape-docs and inkscape-view

SSH to RHEL/SL 5 or 6 fails

$ ssh my-sl6-host.psi.ch
ssh_dispatch_run_fatal: Connection to UNKNOWN port 65535: error in libcrypto
$

You may follow this guide.

No Driver for Nvidia Tesla K40c Accelerator

This hardware is supported up to the driver branch 470 which is no available for RHEL9. Please use RHEL8 instead.

NoMachine and Nvidia and Wayland

This combination does not work. A solution is to fall back to Xorg:

gdm::wayland: false

and enabling VirtualGL on the node:

/usr/NX/bin/nxserver --virtualglinstall

followed by a reboot.

Ghost Icons in Dock after using X-Forwarding

When opening applications on a remote machine via ssh X11 tunneling in certain cases the application icon remains in the taskbar.

This is a reported RHEL bug RedHat is working on. More details can be found here: https://redhat.atlassian.net/browse/RHEL-95478