today's howtos

posted by Roy Schestowitz on Oct 27, 2022

• Dir Command in Linux [Examples]

  How do you see the contents of a folder in the Linux terminal? You use the ls command.

  In fact, the ls command is so popular that many Linux users don't even know about dir.

  Yes, there exists a dir command with the sole purpose of showing you the directory contents. And in this tutorial, I'll show you how to use it.

• How to fix the VirtualBox USB enumeration error and extension pack installation | TechRepublic

  Jack Wallen experienced several errors upon installing VirtualBox 7.0 and he has the fixes for them.

  Recently, I upgraded to VirtualBox 7.0, and it’s been a stellar release for the virtual machine management tool. While some VirtualBox upgrade experiences were less than ideal, the march from 6.x to 7.x was, for the most part, pretty painless. However, there are two issues you will probably encounter, both of which require different fixes.

• Build a Tailscale exit node with firewalld - Major Hayden

  Once upon a time, I spent hours and hours fumbling through openvpn configurations, certificates, and firewalls to get VPNs working between servers. One small configuration error led to lots of debugging. Adding new servers meant wallowing through this process all over again. A friend told me about Tailscale and it makes private networking incredibly simple. Tailscale makes it easy to add nodes to a private network called a tailnet where they can communicate. In short, it’s a dead simple mesh network (with advanced capabilities if you’re interested). This post covers how to create an exit node for your Tailscale network using firewalld Fedora, CentOS Stream, and Red Hat Enterprise Linux (RHEL).

• Reload Prometheus ConfigMap without Restarting the Kubernetes Pod | Lisenet.com :: Linux | Security | Networking

  We run Prometheus on Kubernetes. Every time we make changes to Prometheus ConfigMap, we end up restarting the pod so that the new configuration would be picked up.

  While Prometheus configuration does not change very often, we would prefer to have a way to do this without downtime.

• Convert a root filesystem to a bootable disk image - formicapunk

  The year is 2022, and it is still that complicated to install GRUB2 externally onto a disk image.

  But using the wonders of libguestfs, you can create a bootable diskimage using a qemu VM abstraction very easily. The steps here imply we want to create a disk with a single partition containing the root filesystem.