RHEL8

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Although the RHEL 8 hasn’t yet been released, the RHEL 8 Beta is already available.

Here are some aspects of it:

  • it uses the dnf command instead of yum with an identical syntax (yum is an alias for dnf),
  • the file system Btrfs, once in technical preview, is no longer available,
  • concerning the Python language used for most of the system scripts, the version 3.6 will replace Python 2.7 (more details here),
  • about LDAP, OpenLDAP is no longer available, you have to use the 389 LDAP server or something else,
  • you can’t remove NetworkManager from your configuration (it was already the case with the Gnome graphical environment in RHEL 7.5),
  • KDE is removed from the desktop (KDE is deprecated according to the RHEL 7.6 release notes),
  • a new mechanism called application stream is introduced (more details are available here, here and here).
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RHCSA7: Task of the day

Allowed time: 5 minutes.
Add 100MB of swap space to the machine using a new logical volume.

RHCE7: Task of the day

Allowed time: 10 minutes.
Configure a system to forward all email to a central mail server at 192.168.1.1 (change the IP address accordingly).

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