The Wombelix Post

Category: Linux

1. Provide outgoing IPv4 connectivity to Docker Container on a IPv6-only Host via clatd (464xlat)

   My experiences are based on a recent Harbor setup on Rocky Linux, but should be easily transferable to any other Application and Linux Distribution. The journey began after Harbor was ... [read more]

2. vCloud Usage Meter 4.5 Upgrade - Error(908) Command line option is invalid: --skipdigest

   Again a interesting bug, this time during the In-Place Upgrade of a VMWare vCloud Usage Meter from Version 4.4 to 4.5, which shouldn't be a big deal based ... [read more]

3. Journey from RHEL 7 to CentOS 7 and Oracle Linux 8 with elevate

   From a technical point of view, every Red Hat Enterprise Linux derivate is as good as the original. If you are happy with community support, your use case doesn't require ... [read more]

4. EMail Notification to Unlock LUKS encrypted disk via Dropbear SSH

   I'm running Proxmox VE Hosts with full encrypted disks and Dropbear SSH to unlock them remotely. I wanted to get notified when I have to login and enter the key ... [read more]

5. openSUSE Leap 15.3 on VMware vSphere 6.7: Get Guest Customization working

   Technically openSUSE Leap 15.3 is equal to SUSE Linux Enterprise Server 15 SP3, both share the same code and binary packages, the only difference is community vs. commercial support ... [read more]

6. Uyuni Test Environment with sumaform on local libvirt host (openSUSE Tumbleweed)

   A convenient way to quickly setup a local Uyuni Instance inclusive Clients, either for Development or Testing, is sumaform. It supports different backends and provides a ton of options, check ... [read more]

7. Mail relayed but never delivered?! Gitea > Postfix > IIS > Mimecast

   You can learn something new every day, for example how mails just got lost during relaying through mulitple smtp server without noticing. At work we running a simple Postfix mail ... [read more]

8. Proxmox and NAT64 - jool seems incompatible with PVE Firewall, Tayga to rescue

   I'm using IPv6-only whenever possible, but some sites like github.com are still not reachable via IPv6. In such a case NAT64 is the way to go and to simplify ... [read more]

9. sshd error - Bind to port failed: Cannot assign requested address

   I faced a very weird issue today, sshd failed to start on boot because ListenAddress was set but network.target doesn't mean IP addresses are already assigned and ready. So ... [read more]

10. Certified Specialist in Performance Tuning - Hardest Red Hat Exam

    I took five Red Hat Exams within the last six months and have to say, the by far hardest one was EX442 (Certified Specialist in Performance Tuning). Despite a lot ... [read more]

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