To find out the WWN port name of a HBA under Linux, reading the port_name file is sufficient - e.g. for all HBAs:

1$ cat /sys/class/scsi_host/host*/device/fc_host/host*/port_name
20x2002f6dc44b8e2b6
30x2001f6dc44b8e2b6

After a system crash I recently had the problem that Foreman had several orphaned tasks that could not be stopped from the web interface:

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  alt="Hängende Aufgabe" …</picture></figure></p>

I'm currently working on a blog post series about Foreman, Katello and Red Hat Satellite 6.

Here's the link collection for beginners:

1. "Introduction and installation" (also published on Pro-Linux [button size="xsmall" color="red"]german[/button])
2. "Products, Repositories and Content …

Currently I'm spending a lot of time on automating complex application scenarios; during training I also starting learning about creating customized REST applications. The result was a tutorial which covers all stages of developing a small "RESTful" application:

1. Concept/Definition
2. Development
3. Tests and …

The last couple of years I spent a lot of time in managing Linux systems with Spacewalk and Red Hat Satellite 5. Because the application was superseded by the vendor, I investigated on migrations to the successor.

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  loading="lazy" …</picture></figure></p>

Recently, I had to remove a SAN LUN on a physical Enterprise Linux system. The first step was to alter the multipath service configuration file (/etc/multipath.conf) and make the daemon reload its configuration:

1# vi /etc/multipath.conf
2...
3ESC ZZ
4
5# service multipathd reload

Afterwards, the device was removed …

Foreman, Katello and Red Hat Satellite 6 users have multiple possibilities to monitor infrastructure health. Beside the Foreman host, also managed systems and defined software content are worth monitoring.

Foreman dashboard

Foreman/Katello and Red Hat Satellite offer a dashboard with some widgets that can be used for …

GitLab can utilize LDAP to authenticate against a variety of directory services such as Microsoft Active Directory Domain Services or FreeIPA and Red Hat Identity Management. This post describes configuring and integrating into FreeIPA.

By clicking Identity > User Groups > Add within the FreeIPA interface, an …

Photon OS is minimalistic RPM-based Linux distribution which is focussed on running Docker containers. It was optimized for VMware platforms (Workstation, Fusion, vSphere, vCloud Air) - e.g. its Linux kernel offers a caching mechanism optimized for vSphere.

Another characteristic is the customized package manager tdnf …