Linux

Moving virtual machines between Proxmox hosts is straightforward when you have a cluster configured, but what if you’re running standalone nodes? This guide walks through the process of migrating VMs between two independent Proxmox servers on the same network, without needing to set up clustering. [IMAGE: Diagram showing two Proxmox servers on a flat LAN with an arrow indicating VM migration between them] I recently needed to migrate several VMs from an older Proxmox host to a newer one with faster storage. Both systems were on the same network but not clustered, and I wanted to avoid the overhead of downloading backup files through the GUI. The solution? Streaming backups directly over SSH using Proxmox’s built-in vzdump tool. ...

Updated October 2026: added the one-line quick answer, the “I grew the virtual disk first” path (growpart and pvresize), a troubleshooting section and the agent handoff block. The original walkthrough below is unchanged. Quick answer If your Ubuntu root volume is full and vgdisplay shows free space in the volume group, this one command gives the whole lot to the root LV and grows the filesystem in the same step: ...

Updated October 2026: the code in my 2020 version of this post didn’t run. It used : where it needed =, wrote Import with a capital, and passed a command string to Popen without a shell, which raises FileNotFoundError. I’ve rewritten the examples, run every one on Python 3.14.4, and added the part I should have warned you about, which is shell injection. A quick Google of the title only gave me answers for the inverse, calling a Python script from bash and handing it variables. At least the first three results did, and I’m probably not alone in scrolling past the Stack Overflow answers. ...

Error Correcting Code (ECC) RAM is a variation of coputer memory which helps to ilimintate data curruption or ‘bit rot’, but it is not always imediately apparent if your system memory is running in ECC mode; here is a quick guide on how to check if your system memory is running in ECC mode. This guide covers Windows and Linux systems, but please ensure that if you are running either system in a virtual machine configuration that this command is ran on the host machine. ...

The Pi enthusiasts have been waiting for official USB boot support on the Raspberry Pi for what feels like a lifetime, but finally it is on the horizon. In this post I will explain how to make your Raspberry Pi boot from USB. WARNING: Although this is official, it is still in beta testing, so rock-solid stability is far from certain. Learn more about this beta release here. Why should I make my Raspberry Pi boot from USB? Firstly let me address why you would want to do this and what makes many people relieved that the feature is on the horizon. ...

Note: Ubuntu 18.04 LTS reached end-of-life in April 2023, and Ubuntu 20.04 LTS reaches EOL in April 2025. If you’re starting fresh, install Ubuntu 24.04 LTS. The do-release-upgrade process shown here is still valid for sequential LTS upgrades. Ubuntu 20.04 LTS full release is almost upon, with a scheduled release date of April 23rd 2020 (2 days as of writing this). It is packed with lots of great new features and upgrades and the Linux community is very excited to get a hold of it. If you are looking to upgrade ubuntu, there is a quick guide down below. ...

https://snapcraft.io/nextcloud I have been using the Nextcloud snap package for a long time, but some recent system changes in my colocation facility mean that it is time for a big upgrade. Rather than migrate my existing Nextcloud instance, I have decided to build a new install and here are my goals for the new installation: Use lets encrypt to have automatic and valid HTTPS certificates Have the data path for Nextcloud on a HDD and the rest of the host OS on an SSD. Host OS Details For this setup, I am using Ubuntu 18.04 installed on a 30GB SSD backed partition. I then have a 1TB disk attached and mounted to /media. ...

** Rejoice! Kali Linux 2020.1 is here! The first release of 2020 has arrived and this post will contain some updates and my initial thoughts on the fresh release. Kali Linux 2020.1 features and changes Non-Root by default Kali single installer image Kali NetHunter Rootless Improvements to theme & kali-undercover New tools Full Kali release notes as per their release blog post: https://www.kali.org/releases/kali-linux-2020-1-release/ Got root? Kali has installed with root as the default user since the dawn of its existence, Backtrack, WHAX and Whoppix, but finally, the devs have decided that it time to bring Kali in line with Debian on this one and have a default user which is no longer root. ...

Note: This guide was written for Kali Linux 2019.4. The core dkms build method still works on current Kali, but package names and kernel headers may differ slightly on newer releases. Authorised use only: monitor mode and packet injection are standard tools for testing wireless networks you own or have written permission to assess. Using them against anyone else’s network is illegal in the UK under the Computer Misuse Act 1990. This post covers getting the adapter’s driver working and nothing else. ...

I spent more time that care to admit trying to setup a shared folder between my windows host and Kali VirtualBox VM. So hopefully the Google algos pick this one up and save you the time trying to find the right packages to fix this a clipboard sync. apt-get update apt-get install -y virtualbox-guest-x11 Go for a quick reboot once the above commands are complete and you should have clipboard sync (text) and shared folders should mount successfully. ...